GROZNY, Russia — The father of a Chechen immigrant shot dead by U.S. law enforcement agents while being questioned about his ties to a Boston Marathon bombings suspect said today that he regrets allowing his son to go to the United States.

Ibragim Todashev, 27, was a mixed martial arts fighter who had trained with Tamerlan Tsarnaev in Boston, and his father said they had bonded because of their shared interests and heritage as Chechens from southern Russia. Tsarnaev, 26, was killed in a shootout with police days after the April 15 terrorist attack.

Todashev was killed Wednesday after an altercation with an FBI agent during a meeting with the agent and two Massachusetts state troopers at his home in central Florida.

Abdul-Baki Todashev said that his son — the second of 12 children — got an opportunity to go to the United States to study English about five or six years ago. He said he later agreed to his son’s request to remain in the U.S. “because it seemed like the safest country.”

Chechnya has been ravaged by two wars between separatist fighters and Russian federal troops since 1994, and remains troubled by periodic outbreaks of violence.

The elder Todashev said his son gave up martial arts because of an injury and later held a number of jobs, including as a driver at a retirement home, before moving to Florida in the past year. His father said his son had planned to come to Chechnya this week to visit his extended family, but was asked by the FBI to delay his trip.

The FBI gave no details on why it was interested in Ibragim Todashev except to say that he was being questioned as part of the Boston investigation.

However, two officials briefed on the investigation said he had implicated himself as having been involved in a 2011 triple-slaying in a Boston suburb; investigators now suspect that Tsarnaev may have been involved in the unsolved crime.

Abdul-Baki Todashev said, “Out of fear of the lawlessness in Chechnya, I sent him to the U.S., because it seemed like the safest country at the time. Now I’m thinking about how to bring home his body. As it turns out I sent him to his death.”