Covert US drone attacks on Yemen have increased this month to exceed the number of strikes on Pakistan's tribal areas, a Bureau of Investigative Journalism reports states.

Up to 500 people, many of whom were civilians, have been killed since last May as part of the US drive to eliminate al-Qaeda from the Arabian Peninsula, according to the report.

But, even after attacks with civilian casualties, there has been little reaction from the Yemeni government.

Al Jazeera's Nadim Baba reports.

Source: Al Jazeera