COLUMBUS, Ohio -- Attorneys for a condemned Ohio killer scheduled to die next month say multiple health problems put him at risk for harm during lethal injection.

The attorneys say Arthur Tyler has a history of heart problems and diabetes and risk factors including hypertension, breathing difficulties and being overweight.

A federal court filing Monday in Columbus said Tyler also could suffer adverse reactions from medication he has taken, including blood pressure drugs.

Tyler argues that lethal injection drugs would amount to cruel and unusual punishment. The drugs are the only execution method under Ohio law.

Tyler was sentenced to die for killing Cleveland produce vendor Sander Leach during a 1983 robbery.

A message was left with the Attorney General's office, which was expected to oppose the filing.