Information trickling out of Iran on Tuesday suggests that a crackdown by authorities to end more than two weeks of widespread anti-government protests has likely been far more deadly than activists outside the country have reported. With phone lines opening back up for calls from inside the Islamic Republic, two sources, including one inside Iran, told CBS News on Tuesday that at least 12,000, and possibly as many as 20,000 people have been killed.

[…] based on reports from medical officials across the country, believed the toll was at least 12,000, and possibly as high as 20,000.