PITTSBURGH — About 100 protesters at Duquesne University are urging the school to drop its opposition to a union drive for adjunct professors.

A series of speakers including clergy, union representatives and academics chastised the administration of the 10,000-student Roman Catholic university at Thursday's protest.

Instructors at Duquesne voted last year to join the United Steelworkers union.

Duquesne is appealing results of the election, which was conducted under supervision of the National Labor Relations Board.

The university argues that it should be given a religious exemption and be allowed to withdraw from a previous agreement with the Steelworkers union to allow the election.

PHILADELPHIA — Caskets unearthed during construction at a city schoolyard might have been originally interred at a cemetery that existed at the site until the 1950s, records indicate.Workers digging up asphalt at the William Dick Elementary School have found at least four coffins with human remains, district spokesman Fernando Gallard said Thursday.The crews had been working on a playground rehabilitation project, which is now on hold while an archaeologist examines the site, said Gallard.Online city records indicate the Odd Fellows Cemetery once occupied land in north Philadelphia where the school now sits.The burial ground was established in 1849 and closed just over a century later in 1951.