More than 500 people have been killed in 2,000 air strikes across Syria by regime forces over the past 40 days, a monitoring group said Friday.

The Syrian Observatory for Human Rights accused President Bashar al-Assad’s government of “war crimes”, saying it ought to be “listed in the Guinness Book of World Records” for the large number of strikes since October 20.

The Britain-based group, which relies on a broad network of activists and medics on the ground for its information, said the raids had left at least 527 dead and 2,000 wounded. […]