Taliban threats put Islamabad on high alert

The threat of more Taliban attacks is forcing a new security clampdown in Islamabad where concrete barricades and security checkpoints have been set up across the capital.

The security alert follows a warning from Baitullah Meshud, Pakistan's Taliban leader, to strike Islamabad unless the US stops launching deadly missile attacks against his fighters.

Al Jazeera's Kamal Hyder has more.