Updated

Twitter says Venezuela has blocked images on its service and it offered a workaround for users who want to get tweets via text message on their cellphones.

Company spokesman Nu Wexler said Friday via email that "Twitter images are currently blocked in Venezuela."

Venezuela's main telecommunications company, CANTV, is government-run and handles the overwhelming majority of Internet traffic.

Users told The Associated Press that the blockage had ended by Friday and was most intense Thursday, a day after two students were killed by gunfire during protests.

Video and still images that circulated via Twitter after the killings purported to show police and pro-government activists shooting at protesters. The images' authenticity could not be confirmed.

Media coverage of the protests was limited, as Venezuela's government dominates the country's airwaves.