Four tires blew out on a Northwest Airlines (search) jet while it was landing at Detroit Metropolitan Airport (search) on Saturday, the first day of a mechanics strike at the airline.

No injuries were reported, Northwest spokeswoman Jennifer Bagdade said. She said it was premature to speculate on the cause of the blowout.

"Issues like this occur from time to time at any airline, and at Northwest, we investigate any such operational issues," she said.

Flight 210 (search) from Seattle was carrying 222 passengers when it landed just before 4 p.m.

The Boeing 757 came to a stop on a taxiway, and buses lined up to transport the passengers to the terminal. Crews were using trucks to clear a runway of debris.

Earlier Saturday, Northwest's union mechanics walked off the job amid failed contract talks rather than agree to take pay cuts and layoffs. Northwest, the nation's fourth-largest carrier, turned over its maintenance work to replacement workers. The strike is the industry's first major walkout in seven years.