WASHINGTON — Lawmakers accused General Motors of a potentially criminal cover-up of its defective ignition switches and fumed at the lack of answers from its new CEO during a second day of hearings Wednesday into why the automaker waited a decade to recall cars with a deadly flaw.

The Senate subcommittee said GM should tell owners of the 2.6 million recalled cars to stop driving them until they are repaired. CEO Mary Barra gave assurances that the cars are safe to use while owners wait for the replacement part, saying she would let her son drive one if he took certain precautions.

GM has linked the switch to 13 deaths and dozens of accidents, while others have a higher count.

HARRISBURG — Pennsylvania casinos have posted their fifth consecutive monthly revenue decline from slot machines.The Pennsylvania Gaming Control Board said Wednesday that revenue from slot machines totaled $216 million last month, down 5.7 percent from a year ago.Counting only the 11 casinos that were also open in March of 2013, revenue slid 6.7 percent. Nine of those casinos posted year-over-year losses.