The search continues for the people behind the murder of a US Border Patrol agent.
Nicholas Ivie was shot and killed Tuesday morning while responding to a motion sensor in the desert 5 miles north of the border.
Late Wednesday afternoon there were reports that Mexican authorities have detained two people just south of the border.
At this point, U.S. officials are being very cautious and they are not saying if those people are suspects.
Wednesday morning, Nicholas Ivie's body headed back to his family. More than a dozen Border Patrol vehicles led the procession through Sierra Vista.
People gathered on the side of the road --a very emotional scene as many Border Patrol agents live in Sierra Vista.
Nicholas Ivie and two other agents, a man and a woman, were responding on foot to that tripped motion sensor when they were shot at.
A specialized evidence processing team is still working the crime scene, as friends and family continue to mourn.
"Being involved in law enforcement is one where you literally risk all. He was willing to do that and in the end he gave his all," said family friend Kevin Goates.
Ivie's family has flown in from Provo, Utah. He lived in Sierra Vista with his wife and two daughters, ages one and three. He was prominent member of the LDS church.
"Very soft spoken. Gentle giant if you will."
Many Border Patrol agents live in Ivie's neighborhood.
"It would be painful to know that it was one of them, I wish that it would be none of them," says neighbor Paul Montenes. "It is thankless at times and they cover such a large area. And the threat they face."
Ivie knew that threat well. He joined the Border Patrol in 2008 and was based out of the newly renamed Brian Terry Station in Naco. Terry was killed two years ago.
The spot where Ivie was killed, which is about 7 miles west of Bisbee and 5 miles north of the border, is a known drug smuggling corridor.
"They have the advantage in many cases, because they are there and we are entering an area and they can easily ambush or flank our movement, and then they flee," says Pinal County Sheriff Paul Babeu.
It's not clear yet if Ivie's killing was drug related. The Cochise County Sheriff and the FBI say the hunt for the suspects continues and they won't say if they've found any weapons at the crime scene.
Funeral arrangements for Agent Ivie are pending. We've also learned that President Obama called Ivie's family last night to offer his condolences.
Also Wednesday, the agent that was shot but not seriously hurt was released from the hospital.