Devastation Mounts In Misrata After Heavy Shelling On Port

In the wake of what rebels describe as the heaviest shelling yet by pro-government forces on the port of Misrata, much of the western Libyan city appeared to be a wasteland Wednesday morning.

"I'm looking around, I can't find a single building that's not either damaged or destroyed," CNN's Reza Sayah said from Tripoli Street, a major thoroughfare in the city.

Witnesses said three people were killed and several were wounded after shells detonated near a refugee camp in the critical port area Tuesday. Thousands of migrants have been housed there as they wait for ships to carry them to safety.

Opposition forces said they believe if NATO forces had not intervened with air attacks Tuesday night, the shelling would have continued.

The latest destruction in Misrata comes amid renewed discussion about what NATO's intentions are -- and whether the alliance is trying to kill Libyan leader Moammar Gadhafi.

NATO is leading an international military operation in Libya that includes airstrikes targeting Gadhafi's military resources. It is operating under a U.N. Security Council resolution authorizing any means necessary -- with the exception of foreign occupation -- to protect civilians.