Zubeidat Tsarnaeva, the mother of the Boston bombing suspects Dzhokhar and Tamerlan Tsarnaev, watches the video of her dead son’s mutilated body and cries, her lawyer revealed on Tuesday, after it emerged that she is to be questioned by US investigators.

Zubeidat Tsarnaeva appeared publicly outside her home for the first time since her sons Tamerlan and Dzhokhar Tsarnaev were named as suspects. She was ushered past journalists and into a taxi, which sped away.

US investigators traveled to southern Russia today to speak to Zubeidat Tsarnaeva and her husband Anzor Tsarnaev, an American Embassy official said.

Zubeidat Tsarnaeva is in Dagestan, a predominantly Muslim province in Russia’s Caucasus, where Islamic militants have waged an insurgency against Russian security sources for years.

The family’s lawyer Heda Saratova, asked for the family to be left alone and said that the parents had just seen pictures of the mutilated body of their elder son Tamerlan Tsarnaev and were not up to speaking with anyone at the moment.

“The mother is in very bad shape,” Heda Saratova said.

“She watches the video [of Tamerlan Tsarnaev] and cries.”

Zubeidat Tsarnaeva appeared publicly outside her home in Dagestan for the first time since her sons Tamerlan and Dzhokhar Tsarnaev were named as suspects

The trip by the US team was made possible because of Russian government cooperation with the FBI investigation into the bombing at the Boston Marathon.

Dzhokhar and Tamerlan Tsarnaev are accused of setting off the bombs that killed three people and wounded more than 180 others on April 15.

Tamerlan Tsarnaev, 26, was killed in a police shootout, while his 19-year-old brother Dzhokhar was captured alive but badly wounded.

The embassy official said he could not confirm whether the US investigators had already talked to the suspects’ parents.

“Naturally, the parents are not ready to meet with anyone because the grief is enormous,” Russian official Zaurbek Sadakhanov told a crowd of journalist in Makhachkala, the capital of Dagestan.

“They … are asking to be left alone, at least for a while, to be able to recover.

“As to the case, I think that detectives and policemen in the United States are knowledgeable and will find out what happened in an objective and unbiased way.”

Zubeidat Tsarnaeva is from Dagestan, while the suspects’ father, Anzor Tsarnaev is from neighboring Chechnya.

Dzhokhar and Tamerlan Tsarnaev had spent little time in either place before the family moved to the US a decade ago, but Tamerlan was in Russia for six months last year.

The father of the two Boston bombing suspects will apparently travel to the US later this week in order to seek “justice and the truth.

Anzor Tsarnaev says he has “lots of questions for the police” and is keen ‘to clear up many things’”when he arrives from his home in Makhachkala in Russia.

He had previously said that he would return to America this week in the wake of the death of his elder son Tamerlan and the arrest of 19-year-old Dzhokhar.

Zubeidat Tsarnaeva added that the family hoped to bring Tamerlan’s body back to Russia.