17, with a bomb attached to a scooter. The Security Service of Ukraine (SBU) claimed responsibility for the attack.According to Kommersant and several other Russian outlets cited by independent news website Meduza, the two suspects carried out the killings on the orders of the SBU.They were detained by police who saw surveillance cameras’ footage from the scene which recorded a pair of suspicious cars.Russian Telegram channel 112 said the suspects had already confessed to authorities. One, a 29-year-old male, reportedly said he flew to Moscow where he rented a car, installed cameras to record the explosion, and used a homemade explosive device. According to his alleged testimony, he was promised $100,000 for the murder and was in touch with an SBU officer through a messaging app.Russian officials have not yet announced the conclusion of the investigation.