at Least 22 government soldiers and 21 jihadists were killed in Monday's fighting, said the opposition Syrian människorättsobservatoriet which monitors the war from Britain, according to the AFP news agency.
No one was injured in the attack on the Russian airbase, writes the news agency Reuters. Russian lyftvärn shot down the rockets, according to the Russian department of defense.
major regimoffensiver after an agreement in september on de-escalation and the establishment of a buffer zone. But then the banned terrorist alliance Hayat Tahrir al-Sham (HTS), took full control of the area in January, attacks have intensified.
Around 200 civilians have been killed in attacks since February and close to 140,000 people have according to the UN, forced to flee their homes.
Approximately three million people live in the Idlibprovinsen.