Sirens are sounding in Ashdod, Mitzpe Ramon, Kiryat Malachi and Gan Yavne.
Several rockets are reportedly being intercepted by Iron Dome.
One rocket is believed to have fallen near Ashdod. Security forces are searching for the downed warhead.
Police are reiterating their call to residents not to approach rockets felled by Iron Dome, as warheads may still be active. Residents are asked to call police at the emergency number 100 if they find a fallen rocket.