ALIQUIPPA, Pa. - An 81-year-old man has been upgraded to serious condition a day after he was found bound and gagged during a home invasion robbery during which his car was stolen from outside his western Pennsylvania home.

Hopewell Township police haven't named any suspects in the attack on 81-year-old Dan Santia, who was listed in critical condition Monday at a Pittsburgh hospital. His condition was upgraded Tuesday.

Police say someone forced their way into the man's home late Sunday or early Monday and tied him up before stealing his Cadillac. A caretaker arrived to find Santia later Monday and his car was recovered about 6 p.m. that day.

Police still aren't sure whether the robber took anything else.

Hopewell is about 20 miles northwest of Pittsburgh.