New Delhi, July 8 -- The woman suspected of trying to kill a Ukrainian business tycoon in a bombing attack in Monaco last week was found dead in Ukraine with gunshot wounds to the head, Ukraine's Security Service said on Tuesday.

A Ukrainian military intelligence officer confessed to killing the bombing suspect, Anastasiia Berezovska, with the help of a former law enforcement officer, said the security service, known as the SBU. The military intelligence officer said he acted on his own and without the knowledge of his superiors, the SBU said.

Both men were detained on suspicion of murdering Berezovska, a Ukrainian national whose last known residence was in Germany, according to authorities. They also "may have been involved in planning...