At least 15 commercial flights in Europe received bomb threats on Thursday, according to a CBS News video report. That report said the threats brought the week's total to more than 20 flights. Holly Williams reported the story for CBS News.

PBS NewsHour, in a report by Colleen Barry of The Associated Press, said more than a dozen flights in Europe received bomb threats. The PBS NewsHour report said a British official called the threats "malicious" hoaxes. It also said no hazardous or suspicious materials have been found.

The two reports differ on the number of flights. CBS News counted at least 15 on Thursday, while the PBS NewsHour report, based on Associated Press reporting, said more than a dozen. Neither report reconciles the two counts or says whether they cover the same flights.

Neither report names the airlines, airports, or countries affected. Neither identifies the British official by name. Neither says whether any flight was diverted, delayed, or searched, or how the threats were delivered.

The CBS News item is a video report, while the PBS NewsHour report carries an Associated Press byline. Both summaries are brief, and the reports leave the full scope of the incidents unclear.

Sources: CBS News: At least 15 European flights receive bomb threats in a single day; PBS NewsHour: More than a dozen flights in Europe receive bomb threats that an official calls 'malicious' hoaxes.