A man who blew himself up with a grenade in Grozny had been suspected of murdering opposition politician Boris Nemtsov, a source in law enforcement told Interfax.
"The man surrounded by law enforcement in Grozny had been suspected of Nemstov's murder," the source said, adding that the man threw one grenade at police and blew himself up with another.
Interfax does not have official confirmation of the information so far.
None of the police officers or local residents was injured.
On Saturday, secretary of the Security Council of Ingushetia Albert Barakhayev told Interfax that a third person had been detained on suspicion of involvement in Nemtsov's murder.
"We have information of the detention of Zaur Dadayev as well as Anzor Gubashev and his brother," Barakhayev said.
According to an Interfax source in law enforcement, the third suspect is Anzor Gubashev's brother, Shagid.
Nemtsov, an opposition leader and a former Russian deputy prime minister, was killed in the center of Moscow late on Feb. 27. Federal Security Service (FSB) Director Alexander Bortnikov said on Saturday that two men identified as Anzor Gubashev and Zaur Dadayev had been detained on suspicion of involvement in the murder.
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