Israel carried out an airstrike on a southern Beirut suburb on Sunday, saying it killed Hezbollah’s chief of staff Haytham Tabtabai and warning the Iran-backed militant group not to rearm and rebuild a year after their latest war.

Hezbollah and Hamas have reportedly increased military cooperation in Lebanon, with Hamas allocating entire companies of fighters to join Hezbollah’s elite forces in the south. This alliance follows Hezbollah’s weakened position after its recent war with Israel and Hamas’s growing influence during Israeli strikes.

On Sunday, Israel launched an airstrike in the capital Beirut for the first time in several months, killing Hezbollah chief of staff Haytham Ali Tabataba'i. ABC News' Tom Soufi Burridge reports.

Israeli forces on Sunday struck Lebanon's capital for the first time since June, killing Hezbollah's chief of staff Haytham Tabtabai. The attack on Beirut’s southern suburb, the latest in an unending series of Israeli violations of its ceasefire with the Lebanese group, killed at least five people and injured 25, the country’s health ministry said.

Israel has killed the chief of staff of the Hezbollah militant group in an air strike in Beirut – the first attack on Lebanon’s capital city in months.