Hours after Israeli reports said Russian S-300 anti-air defense systems in Syria came online and were "operational," the Israeli military allegedly launched a major aerial attack on Syria in the middle of the night Sunday.

According to a breaking AFP report:

Syria said Israeli jets attacked several military sites near the capital Damascus and the central city of Homs early Monday, killing several people.

State news agency SANA said that Syrian air defense had intercepted several of the incoming missiles that were fired from Lebanese airspace.

Syria reported its aerial defense systems were active during the assault, which further caused damage to multiple civilian homes in the Damascus suburb of Sahnaya, according to SANA.

The major Syrian military airport at Mezzeh on the western edge of Damascus was also a reported target in the attack.

Video from #Damascus allegedly showing #Israel Air Force jets after striking targets pic.twitter.com/5u4YJek6z7

— Anna Ahronheim (@AAhronheim) June 30, 2019

Though total casualties are still unknown, one well-known journalist from Damascus, Danny Makki, is reporting at least 4 civilians killed — including a baby — and over 20 injured.

Some missiles landed in residential areas. pic.twitter.com/iexiOPO3zp

— H.K