COLUMBUS, Ohio - Police have failed to link 11 cases of gunfire at vehicles along the same stretch of interstate to other unsolved series of shootings elsewhere, authorities said Sunday.

Police have contacted law enforcement in other cities to try to compare shootings, Franklin County sheriff's Chief Deputy Steve Martin said.

In a West Virginia county, three people were shot to death in August while doing routine tasks at convenience stores.

In Morrow County about 50 miles north of Columbus, someone shot at two vehicles in October 2002 on Interstate 71 near an interchange.

The Columbus shootings occurred along Interstate 270.

Disability pensions cost state more

DAYTON, Ohio - The number of police and firefighters retiring because of work-related disabilities has increased across the state despite lawmakers' attempts to reduce those pensions and prevent bogus claims.

Some state officials said rules governing disability pensions should be reviewed again, the Dayton Daily News reported Sunday.

About 22 percent of police and firefighters retired on disability in 1998, compared to about 46 percent so far this year, the newspaper said.