New York ? Workers searching through debris in buildings adjacent to the World Trade Center site have found the remains of about a dozen people in the past week, city officials said Saturday.

The official recovery effort ended May 30 when the last debris from the World Trade Center was cleared, but some of the surrounding buildings had not been extensively searched.

Crews searching those buildings over the past week have found bone fragments, teeth and even parts of a plane’s luggage rack, The New York Times reported Saturday.

Megan Sheekey, a spokeswoman for Mayor Michael Bloomberg, said the remains would be turned over to the city Medical Examiner’s office for identification.

“The mayor has said we’ll continue to try and recover and identify those we have lost,” Sheekey said.

Deputy Assistant Chief Edward Kalletta, who is supervising the continuing recovery effort, said the date Bloomberg chose for the ending ceremony was symbolic. “We knew we weren’t going to be finished that day,” he said.

One of the buildings workers are now going through had been searched shortly after the attacks, and rescue crews had found the remains of two people in an elevator, along with large sections of one of the hijacked airplanes. Recent visits with search dogs suggested more remains could be found, officials said.

Another building had a hole blown through the roof, and workers on Friday searched the upper floors where windows were broken out. The crane used for the search couldn’t be erected until the bulk of the work at the trade center site was complete, fire officials said.

A third building, owned by Deutsche Bank, has not yet been searched, in part because its owners fear the process could stir up dangerous contaminants.

“We are working in close cooperation with the city of New York to agree on a joint plan for the removal of the debris in the most expeditious and environmentally safe manner possible,” Rohini Pragasam, a spokeswoman for Deutsche Bank, told the Times.

More than 2,800 people were killed when two hijacked planes were crashed into the World Trade Center towers on Sept. 11. The New York medical examiner has identified just over 1,100 victims from more than 19,500 body parts found in the wreckage.