NIZHNY NOVGOROD, August 31 - RAPSI. Investigators have extended by up to 30 days their probe into the alleged suicide of Alexander Khramov, 59, a deputy department head of the State Sea and River Supervision Authoritys Volga Division. Khramov was involved in the Bulgaria riverboat tragedy as a witness, the Investigative Committees Nizhny Novgorod Department has reported.

Khramovs body was found on the night of August 22 in downtown Nizhny Novgorod. Investigators have pointed to suicide as their main lead.

"The investigation has been extended by up to 30 days. The forensic and ballistic tests are not ready yet," the source said.

The Bulgaria, a double-decked riverboat built in Czechoslovakia in 1955, sank on July 10 on the Volga River in Tatarstan. According to the Investigative Committee, the ship was carrying 201 passengers, of whom 122 died and 79 were rescued.