The man suspected of killing a ranger at Mount Rainier National Park in Washington State is believed to have been found dead, according to police.
Authorities located a body face-down in the snow without any identification, but believe it to be Benjamin Colton Barnes, 24, the sole suspect in Sunday's shooting, according to a Twitter posting from Washington State Patrol spokesman Guy Gill.
Barnes was being tracked by ground and aerial search crews for the shooting death of 34-year-old ranger Margaret Anderson, who tried to block his path when Barnes sped past a checkpoint in the park Sunday morning. Barnes fired shots at Anderson and another ranger before fleeing into the park's wilderness. The other ranger was not injured.
Shortly before the discovery of the body, police said they had been honing in on Barnes' location by following his footprints in chest-deep snow. Authorities said he had some survival training and appeared to be moving in and out of river beds to avoid being followed. Police said they did not know whether he had enough supplies to continue outpacing them.
More than 100 agents from the National Park Service, state police, FBI, and local sheriff's departments had descended on the park to help the search efforts. Authorities had gathered 125 campers that were in the park Sunday into a visitors center, where they were held under police watch overnight. The visitors were evacuated in the dark early this morning.
Three small groups of hikers who were making an ascent of the mountain remained in the park.
Barnes is a military veteran who has a history of criminal violence, including threatening the mother of his child with guns during a bitter custody battle, according to court documents obtained by ABC News.
Anderson was a married mother of two daughters, ages 2 and 4.
Police had been searching the snowy park since early Sunday, using infrared radar, aircraft and ground units to try and track the suspect. Lee Taylor, a spokeswoman for the park, said 111 law enforcement officers from the National Park Service, U.S. Forest Service, Washington State Patrol, FBI, and Pierce and Louis counties are assisting in the search.
Arab League secretary general, Nabil al-Arabi: "We hope to see an end to all these violent activities"
The Arab League secretary general has called for an end to shootings in Syria, warning snipers remain a threat.
Nabil al-Arabi said "all signs of military presence" had left the cities, with tanks and artillery removed.
Some 60 Arab League monitors are checking compliance with a peace plan, but correspondents say protesters are frustrated they cannot stop killings.
The UN says more than 5,000 people have been killed in a crackdown on anti-government protests since March.
There has been no let-up in violence, and activists say at least 390 people have been killed since the observers arrived last week.
Activist group the Local Co-ordination Committees said 20 people were killed on Monday, 11 of them in the flashpoint city of Homs.
Meanwhile in northern Idlib province, mutinous troops killed, wounded or captured a number of government soldiers in attacks on three checkpoints, London-based opposition group the Syrian Observatory for Human Rights said.
There has also been criticism of the head of the monitoring team, Sudanese Gen Mustafa al-Dabi - who is regarded by some as biased towards the Syrian government.
And on Sunday, the Arab Parliament, an advisory body to the league, said the observers should be withdrawn because of the continuing violence.
Rooftop snipers
At a news conference at the league's headquarters in Cairo, Mr Arabi said the mission needed more time to complete its work.
The league would then report on the monitors' activities and decide if more work was needed, he added.
He said the military had withdrawn heavy weapons from residential areas and was on the outskirts of cities, but the violence had not ended.
"All signs of military presence have been withdrawn from the cities; tanks and cannons have been removed ... and are now away from residential areas," he said.
"The observer mission was able to take food supplies into some cities, specially Homs. It also managed to bring out corpses.
"I have spoken with the head of mission and yes, shots are still being fired and there are still snipers in action. We want all these signs of violence to disappear."
Protesters are frustrated with the Arab League's efforts
He added that it was difficult to tell who was firing on whom.
Mr Arabi added that the government had released about 3,500 prisoners since the mission arrived.
The Arab League had asked the opposition to provide it with a list of those they think are still in custody, he said.
The removal of heavy weaponry and freeing of political prisoners are two key points of the Arab League plan, and this will enable the Syrian government to say it is in compliance, says the BBC's Jon Donnison.
The government of President Bashar al-Assad says it is fighting armed groups and that 2,000 security forces personnel have died.
Casualty figures and other information are hard to verify as most foreign media are barred from reporting freely in Syria.