An express train derailed Sunday in northern Japan, killing two people and injuring more than two dozen others, officials said. Strong winter winds were reportedly suspected as a cause, according to AP. Police said up to three more people were still believed trapped in the wreckage, but their conditions were unknown. Kyodo News agency reported one person was rescued, leaving up to two people in the wreck. Five cars of the six-car express train derailed, and three of the cars toppled onto their sides in Yamagata prefecture (state), about 290 kilometers (180 miles) north of Tokyo, officials said. Yamagata police spokesman Ryoichi Omi said that two people _ a woman in her 30s and another woman, age unknown _ died of their injuries. They were among those trapped in the wreckage. Another Yamagata police spokesman Yoshikatsu Oe said 29 others were injured, and more were believed to be still trapped inside the car, though it was unclear exactly how many.