MOSCOW (AP) _ A small bomb exploded outside a shopping mall in St. Petersburg today, but no one was hurt, a news report said.

The bomb, with an equivalent 1.75 ounces of dynamite, left a small crater and shattered the window of a nearby food shop, the ITAR-Tass news agency said.

According to the report, a suspect was detained in connection with the bombing. No one was injured in the blast.

St. Petersburg has been on the scene of several small bombings linked to organized crime feuds.

Russia has been on edge recently after four apartment bombings in Moscow and two other Russian cities left some 300 people dead. Police said those attacks were linked to Islamic militants fighting government forces in southern Russia.