A man who apparently was distraught after a family argument blew himself up Saturday near a Moscow supermarket, Itar-Tass reported.
He was the only person killed, and no other injuries were reported in the incident, which took place in the northeast part of the city.
The man's wife told police that her husband had quarreled with her about three hours earlier, after which he grabbed a gun and left their home, police spokesman Anatoly Lastovetsky was quoted as saying by Itar-Tass.
Lastovetsky didn't specify how the man blew himself up. Interfax reported that witnesses said he parked his automobile near the supermarket, went to its entrance while muttering unintelligibly, pulled out a grenade and set it off.
There were no indications that the act was intended as terrorism, and the spokesman said the domestic quarrel was apparently the motivation, Itar-Tass reported.
The explosion initially sparked fears that it was a terror attack in a city that had one just over a month ago. A suicide bomber killed 37 people in a Jan. 24 blast at Domodedovo Airport, the country's busiest.
