After being closed for almost six hours Saturday, Interstate 91 has reopened between Middletown and Wethersfield after crews worked to clear multiple crashes from the highway. Just after 1:00 p.m., Connecticut State Police reported an accident involving more than 20 vehicles on I-91 southbound at exit 21 in Middletown. That crash caused Troopers to shut down the southbound lanes. A short time later, Troopers announced that I-91 was closed in both directions between exits 20 and 25 due to multiple crashes on both sides of the highway.