(STMW) — Some Metra Union Pacific/Northwest Line trains are experiencing delays up to an hour and half due to mechanical problems in the northwest suburbs Tuesday morning.

Train No. 622/624, scheduled to arrive in Chicago at 8:26 a.m., is stopped in Barrington because of mechanical problems, according to Metra’s website.

READ MORE: Chicago Sky Win First WNBA Championship As They Top Phoenix Mercury

Three other trains — No. 630, 632, and 636 — are stopped behind the other train as of 8:40 a.m., according to Metra.

READ MORE: Amid Continuing Water Pressure Woes In Dixmoor, Residents Aren't Confident The Next Fix Will Be The Last

Both inbound and outbound trains may be operating between 30 and 90 minutes behind schedule.

MORE NEWS: Jubilant Fans, Booming Businesses Near Wintrust Arena As Chicago Sky Win WNBA Championship

(Source: Sun-Times Media Wire © Chicago Sun-Times 2014. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)