Peel Regional Police say a missing Brampton woman's case is being treated as a case of foul play and they are urging people who might know what happened to come forward.

"The investigators believe that certain persons in her household have information about the disappearance, that they are not being fully co-operative," Const. J.P. Valade told ctvtoronto.ca on Thursday about the case of Poonam Litt.

"Those people that have information: We know this is going to be haunting them. We want them to know that the investigation is moving along well and we are going to uncover the truth. So we are urging those people to come forward."

The Brampton woman left her home the morning of Feb. 5, 2009 to walk to her job as a dental office receptionist, which was about a 15-minute stroll from her home. She never showed up at work. Her basic ID was left at home.

After a month, Peel Police said their investigation was going nowhere.

"We did a very extensive canvas of the area where she went missing," Valade said.

Manjinder Litt, Poonam's husband, had been in India when his wife went missing. He last spoke with her on Feb. 3, 2009, learning she was pregnant with their second child.

"I am totally shocked," he told CTV Toronto on March 1, 2009. "Poonam, if you are listening to me, please come home. We are so worried."

Manjinder and Poonam lived with his parents and married sister, who had two children of her own.

In April, Peel police issued a news release debunking a rumour that she had been spotted in the Vancouver area. They appealed for people to provide information about the source of the rumours.

Last July, the Litt family posted a $25,000 reward for information about her disappearance.

At the time of the reward offer, Peel police said the following in a news release: "While there are no indications of foul play, the circumstances surrounding Mrs. Litt’s disappearance are disturbing."

Valade said the money has not been paid out. He couldn't say if the offer had generated any leads.

The case had been handled by the Criminal Investigation Bureau of Peel Police. It is now the responsibility of the Homicide and Missing Persons Bureau, he said.

"Their mandate is to investigate homicides and suspicious missing persons cases," he said.

Manjinder told the Toronto Star on Wednesday that his family insists it has told investigators everything they know. He is considering increasing the reward offer.