An explosion rocked a restaurant on a busy pedestrian street near the Kremlin (search) on Monday night, Russia media reported.

The Interfax news agency (search) quoted police as saying there were casualties.

Marina Maximova, a correspondent for the Ekho Moskvy radio, said in a live report that she saw heavy smoke over the two-story building. She reported seeing at least six ambulances and a wounded man being assisted by doctors.

The restaurant is across from a theater on Old Arbat Street, about a 10-minute walk from the Kremlin.

The explosion came only hours after a deadly truck bomb explosion ripped through a government compound in northern Chechnya (search) on Monday, killing at least 41 people including six children and wounding more than 100, officials said.

It was unclear whether the two incidents were related.