More punctures on [1] more US Airways aircraft. From [2] AP, with thanks to Jeffrey Imm:

CHARLOTTE, N.C (AP) -- Puncture holes were found in the bellies of two US Airways jets at Charlotte/Douglas International Airport, which the FBI said was not likely caused by normal wear and tear.

Officials said the punctures discovered Monday morning during routine visual inspections are similar to damage recently found on another US Airways jet in Florida.

No passengers were in the planes, which were temporarily grounded for repairs.

"There was some damage found on two planes here in Charlotte," FBI spokesman David Martinez said Wednesday. "They were brought through the channels for maintenance and it was brought to our attention. We are now doing interviews.

"We've opened a case, investigating. We're trying to figure if there is a criminal nexis or a terrorism nexis. We've opened the case, and see where it takes us."