The parents of the two suspects in last week's Boston Marathon bombings are set to fly to U.S., and have said they will cooperate with authorities, Russian state news has reported.

Hours after speaking with U.S. and Russian authorities on Wednesday, the suspects' father, Anzor Tsarnaev, told Russian state-run news agency RIA Novosti that he and his wife, Zubeidat, are planning to leave Dagestan, a region in southern Russia, on Thursday, according to CNN.

The FBI spoke with the suspects' parents in the Dagestan city of Makhachkala, where deceased bombing suspect Tamerlan Tsarnaev lived for several months in 2012, CNN said.

A police source said that the parents consented to the United States trip and "will be involved in the U.S. investigation," according to an official Russian news report. Authorities from various U.S. government agencies did not immediately confirm the Tsarnaevs' travel plans, CNN reports. The news outlet also reported that the father would travel to the U.S. alone.

News of the Anzor Tsarnaev's trip to the U.S. comes nine days after two bombs exploded near the finish line of the Boston Marathon. Three people died and 264 were wounded in the attack, CBS News reports.

Anzor Tsarnaev and his wife have publicly stated that they believe their sons are innocent, CNN said.

"What happened is a terrible thing, but I know that my kids have nothing to do with this," Zubeidat Tsarnaev told Britain's Channel 4 News, CBS reports. "I know it. I'm mother. I have -- you know, I know my kids. I know my kids."

She said that she's believes her sons were framed "just because they were Muslim," several news outlets have reported.

Tamerlan Tsarnaev, 26, died three days after the bombings in an early-morning shootout with police in Watertown, Mass. He and his brother, Dzhokhar, 19, are suspected of murdering MIT police officer Sean Collier, who was shot while in his patrol car prior to the gun battle with police.

Dzhokhar was captured the following night when he was found hiding inside a boat in the backyard of a Watertown home. Currently in serious condition, he has been communicating with authorities, according to various media outlets.

Mourners gathered at the MIT campus on Wednesday to honor Sean Collier, according to CNN.