(Michigan City, IN) - All school buildings in Michigan City will be open again for classes Thursday and Friday after 21 school buses were vandalized.

The return to a regular in-person schedule in all of the buildings was made possible from borrowing buses from other school corporations.

Buses from the New Prairie School Corporation and Warsaw made it possible for all of the elementary schools to reopen for classes Wednesday while the remaining grades took part in e-Learning.

Additional buses were later obtained on a temporary basis from La Porte, South Central, Merrillville and Elkhart, school officials said.

Police said 21 buses had their catalytic converters removed sometime Monday night or Tuesday morning.  The discovery was made after an early route driver started the engine on a bus, which sounded loud from having its catalytic converter removed from the exhaust system.

Copper inside catalytic converters attract thieves because of how the metal can be sold as scrap.

All students were switched to entirely eLearning on Tuesday shortly after the thefts were discovered.  So far, no arrests have been reported but the case remains under investigation.