According to published reports, some workers at Ellwood City Medical Center, which has had three troubled payrolls in a roll, reported being paid Friday. It’s unclear if all workers received pay checks or if they were for their full amount. Because they were distributed late, some concern also was being expressed about whether the checks will be good when workers attempt to cash them today. The situation with payroll delays and reported nonpayments of vendors has come under federal and state investigation. The Lawrence County District Attorney’s Office also has opened a criminal probe in the case.