SEATTLE - At least two people say they may have seen a missing local father or his car after he vanished Wednesday on his way home from work, according to the man's family.

Meanwhile, the reward for information leading to his discovery has been doubled to $5,000.

"We just need him to come home," said Christine Francisco, wife of Nicholas Francisco, who disappeared after leaving his Queen Anne office.

"I am begging everybody, begging everybody to please, please help me find my husband because I cannot live my life without him," she said.

Autumn Brown, who is speaking for the family, said deputies are following up on two tips, which has given the family reason to hold out hope.

One is a possible sighting of Nicholas Francisco at a Shell station off Elliott Avenue on Wednesday evening, Brown said. The person who reported the sighting recognized him from his photo, which has been widely distributed by local news media and on flyers.

Deputies also are checking out a tip from a witness who says they saw Nicholas Francisco's car at a Burien public storage on Thursday, Brown said.

She said that deputies also have beeen pinging his cell phone, but have gotten no response. Nicholas' co-workers say his cell phone batteries were dead on his last day at work.

Just before he vanished, Nicholas called his wife and promised his 4-year-old daughter, Zea, he'd make Valentine's Day cookies with her, but never showed.

The Franciscos also have a son, Noah, age 2 1/2, and Christine is pregnant with their third child, due in early October.

"If you can't find him, these kids won't have a daddy then," Christine said in an interview, breaking into tears. "This unborn baby won't have a daddy."

Francisco, 28, drove off from his work in his red 1992 Toyota Paseo hatchback with license plate number 601RHX and headed south toward the Seatac area. He has not been seen since.

In their last phone conversation, from Nicholas' work phone, he told his wife that he was "signing off on something," then planned to head home after running an errand at Costco for her.

"He told me he loved me," she said.

Francisco's co-workers on Friday combed the streets around Francisco's work and retraced his route home, hoping to find some sign of the missing man.

"Literally there is no place to search," said King County sheriff's spokesman John Urquhart. "What we have to do is our investigative work and try to track him either through cell phone or bank records."

"It's not normal for him to make stops, have hangouts or go visit anyone else," said one co-worker. "He's a man who comes home after work."

Christine Francisco said there has been no activity in Nicholas' e-mail or bank account since he vanished.

Francisco stands about 6 feet tall and was last seen wearing a light blue and white button-down shirt, a plain black jacket and a pair of blue jeans.

Anyone with information on his whereabouts is urged call 911 immediately.