INDIANAPOLIS (AP) — Work has halted on part of a new downtown Indianapolis transit center after workers discovered an old building foundation several feet below ground.

IndyGo spokesman Bryan Luellen says the foundation might date as far back as the late 1800s. He says workers also found objects including pieces of glass, flatware and chunks of vases that were left behind when the building was demolished.

Construction has stopped on the part of the site where the foundation lies. Luellen tells The Indianapolis Star ( ) that the transportation agency has hired architects to determine whether the foundation is historically important.

The $20 million transit center could still open partially finished and on time later this year.