Pakistan, Aug. 3 -- A homemade bomb carried by a woman killed at least three people and injured 21 near an upscale restaurant in central Moscow on Saturday evening, authorities said, amid unconfirmed speculation on social media that the attack may have been linked to the war in Ukraine.

The explosion occurred just before 8 pm close to an Italian restaurant located in one of Moscow's seven Stalin-era skyscrapers at Kudrinskaya Square, the police ?said.

Russia's National Anti-Terrorism Committee (NAK) said an unidentified woman carrying an improvised explosive device had tried to get into the restaurant but had been stopped by a security guard.

NAK said the woman, the guard and a customer at the Balzi Rossi Italian restaurant had been ki...