Mercer Island police announced an increased police presence due to what appeared to be an explosive device thrown from a car.

According to Officer Rick Johnson, a bomb squad arrived as authorities arrested two suspects.

The incident began when Bellevue police attempted to conduct a traffic stop and the suspect vehicle fled. The Washington State Police were then called to assist. According to WSP, something was thrown from the vehicle during the chase, which may have been an explosive device.

At this point, traffic in the area came to a complete standstill. Westbound from Bellevue Way and eastbound from 76th Street. The eastbound lanes were reopened shortly before 2 p.m

This is a developing story.

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