Oksana Bobrovskaya, a Russian member of parliament and her husband were both killed in an explosion in Novosibirsk, the largest city in Siberia.
According to a local media source, police suspects that her husband may have detonated a grenade in their car in a fit of jealousy.
"There is a version that he held in his hands a kind of grenade, or a piece of TNT," said a police source, according to the local media.
The explosion took place at about 10:50 pm local time. Witnesses described the bloody scene, as emergency workers searched the wreckage after the blast. Some reports said that the couple’s bodies were partially clothed, as they were taken from the remains of the car.
Vitaly Latypov, head of the police investigation department of Oktyabrsky district, said that a “common grenade” caused the blast, adding that all windows were shattered except the windshield, which was partially damaged.
Investigators are also pursuing claims that Oksana’s husband was actually the sole intended victim of the blast.
"We are checking all the versions, including this," a law enforcement official told a local media source.
Other versions alleged that the couple were arguing just before the explosion and he had accused her of “cheating” on him but this possibility has not been confirmed yet.
Novosibirsk mayor Anatoly Lokot said that the explosion occurred due to family problems.
"This was not a terrorist act," he said.
Oksana, was a member of Vladimir Putin’s United Russia Party and the regional legislative deputy for the Siberian region. Her husband was a former special services officer in the Russian military. They had a four-year-old daughter, who was not in the car at the time of the incident.