2 protesters in Iran killed as social media apps blocked

TEHRAN, Iran — Iran on Sunday blocked access to Instagram and a popular messaging app used by activists to organize and publicize the protests now roiling the Islamic Republic, as authorities said two demonstrators had been killed overnight in the first deaths attributed to the rallies.

The demonstrations, which began Thursday over the economic woes plaguing Iran and continued Sunday, appear to be the largest to strike the Islamic Republic since the protests that followed the country’s disputed 2009 presidential election.