BEIRUT (Reuters) - The death toll in a series of attacks in Sweida province in southwest Syria on Wednesday has climbed to 50, said al-Manar TV, run by Damascus ally Hezbollah.

It cited the head of the Sweida health authority as saying 78 people were wounded.

Islamic State militants killed dozens of people in a string of attacks on government-held parts of the southwest, including multiple suicide blasts in Sweida city, official sources said.