Syrian Troops Shell Central City Following UNGA Condemnation

This image from amateur video purports to show smoke rising in Homs, Syria, February 16, 2012. (AP / Shaam)

This image from amateur video purports to show a Syrian military tank in Daraa, February 16, 2012. (AP / Shaam)

Syria's U.N. ambassador Bashar Ja'afari can be seen on the monitor as he addresses the U.N. General Assembly, February 16, 2012. (AP / UN)

Syrian children who fled Idlib walk during a hailstorm outside a refugee camp near the Turkish-Syrian border in the southeastern city of Yayladagi February 16, 2012. (Reuters)

Hassan Saad, 13, who fled Idlib in Syria, flashes a victory sign while walking outside a refugee camp near the Turkish-Syrian border in the southeastern city of Yayladagi, February 16, 2012. (Reuters)

Demonstrators shout Islamic slogans as they wave Syrian independence flags during a protest against Syria's President Bashar Al-Assad in Istanbul, Turkey, February 17, 2012. (Reuters)

Syrian women living in Turkey shout slogans in front of the Beyazit mosque in Istanbul during a protest against Syria's President Bashar Al-Assad, February 17, 2012. (Reuters)

A demonstrator attends a protest against Syria's president, near Syrian embassy in Cairo, Egypt, February 17, 2012. (Reuters)

Activists say Syrian troops are shelling rebel-held areas in the central city of Homs, just one day after the U.N. General Assembly condemned the regime for violating human rights in its crackdown.