More explosions heard in Kyiv in sign assault is intensifying

People walk past the remains of a missile at a bus terminal, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine March 4, 2022. REUTERS/Valentyn Ogirenko

KYIV (Reuters) - Up to a dozen explosions were heard in downtown Kyiv on Friday morning and air raid sirens wailed, in an apparent sign Russian missile strikes on and around the capital were intensifying.

Reuters witnesses in the centre of the city of 3.4 million people could not immediately confirm the cause of the blasts, but they were more frequent than in recent days and some were louder. There were no immediate reports of casualties.