US police hunting the killer of four Muslim men in a New Mexico city said Tuesday they have arrested their "primary suspect" and charged him with two of the murders.
The killings, three of which came in the last couple of weeks, had sent shock waves through the Muslim population in Albuquerque, with community leaders talking of a growing sense of panic.
But on Tuesday, investigators said a public tip had led them to 51-year-old Afghan immigrant Muhammad Syed.
The breakthrough came after detectives had appealed for public help cracking the case, issuing a photograph of a car they believed was involved in the killings of the South Asian men.
"We tracked down the vehicle believed to be involved in a recent murder of a Muslim man in Albuquerque," Albuquerque police chief Harold Medina wrote on Twitter.
"The driver was detained and he is our primary suspect for the murders."
At a press conference, police said they were still investigating the motive.
Tensions rose in Albuquerque after the discovery on August 5 of a body near an office providing services to refugees.
That came as police were investigating the deaths of two men who had died within the previous 10 days. It is these two murders that Syed has been charged with.
A gun believed to have been used in the slayings was found during a police search of his home.
The November death of an Afghan man in the city was also being probed for a likely connection to the recent killings.
The spate of killings had set nerves on edge in the city's Muslim community.