At least 13 people were killed in an attack on two residential buildings in Baharestan County, located southwest of Tehran, on early Monday, according to the county's governor and Iranian state media Fars.

Search efforts are ongoing to rescue any individuals still trapped under the rubble, The Caspian Post reports, citing foreign media.

And in eastern Tehran, four people were killed and seven injured an early Monday morning attack on residential areas there, reported Mehr news.

Rescue teams were still searching through rubble, it added.