A powerful airstrike targeted central Beirut on Saturday, security sources said, shaking the Lebanese capital as Israel pressed its offensive against the Iran-backed Hezbollah group.

At least four people were killed and 33 wounded in the attack in Beirut’s Basta neighbourhood, Hezbollah’s al-Manar broadcaster reported, citing the health ministry. Lebanon’s National News Agency said early on Saturday that the attack resulted in a large number of fatalities and injuries and destroyed an eight-storey building. Footage broadcast by Lebanon’s Al Jadeed station showed at least one destroyed building and several others badly damaged around it.

The blasts shook the capital around 4am, Reuters witnesses said. Security sources said at least four bombs were dropped.