BRUSSELS, Belgium — NATO said Tuesday that the bombing of regime forces in Libya will continue as long as needed despite growing reluctance among some countries to participate, and Moammar Gadhafi cannot "wait us out."

"As long as his forces continue to attack or threaten civilians, and as long as they continue to try and cut off humanitarian aid, our operations will continue in Libya," spokeswoman Carmen Romero said.

When NATO took command of operations, it expected that a sharp blow would quickly persuade Gadhafi to yield power. But the bombing campaign -- now in its fifth month -- has yet to dislodge the regime.

Eight NATO members have been participating in air strikes in Libya: the U.S., Britain, France, Belgium, Canada, Norway, Denmark and Italy. They have carried out a total of more than 6,200 strike sorties.

But this coalition has been gradually fraying.

The United States was the first to limit its participation, deciding to only provide support to the European allies. Then Italy withdrew its only aircraft carrier and part of its air force contingent. Meanwhile, Norway has announced it will pull all of its F-16 warplanes out of the operation by Aug. 1.

Still, NATO has said Gadhafi should not count on any change in the tempo of operations.

"(NATO) nations are absolutely determined to continue that mission," Romero said. "Gadhafi cannot wait us out."

Col. Roland Lavoie of NATO's operational command in Naples, Italy, said the alliance would continue to have the resources needed to maintain the current average of between 100 and 140 sorties a day.

Lavoie said pro-Gadhafi forces were increasingly occupying facilities that once held a civilian purpose. These included stables, farm buildings, commercial and industrial warehouses, factories, and food processing plants.

"By occupying and misusing these facilities, the regime has transformed them into military installations, from which it commands and conducts attacks ... rendering them valid and necessary military objectives for NATO," Lavoie said.