Police cadaver dogs were at a Hartford trash facility on Tuesday searching for evidence in the case of missing Connecticut mom Jennifer Dulos, a law enforcement source told The Post.

“Right now, it’s a mystery where she is,” said another source, a Connecticut police officer involved in the investigation. “We don’t have a strong lead.”

Dulos, a mom of five, disappeared after dropping her kids off at school near their home in New Canaan on the morning of Friday, May 24.

Her estranged husband, Fotis Dulos, and his girlfriend, Michelle Troconis, are suspected of dumping clothing and household items with Jennifer’s blood on them in public trash cans along Albany Avenue in Hartford around 7 that night, court papers show.

The waste facility, which burns garbage as a trash-to-energy plant, is about 5 miles from the section of Albany Avenue where the pair allegedly stopped more than 30 times to dump garbage bags with the blood-stained items in receptacles.

A worker at the state Material Innovation and Recycling Authority (MIRA) plant, near the Hartford-Brainard Airport and where the police dogs were feverishly working, said he was recruited from another site to help out with the search.

“They just called me to come down here from another place and not let anyone in,’’ the man said.

“Clearly, something is going on.”

Police had contacted MIRA on Friday to try to track down where the trash put in the public receptacles would end up, the Hartford Courant reported. The agency identified two trucks that would have collected it and said they would have brought their contents to the facility.

The bad news was, many of the garbage cans allegedly used by Fotis and Troconis had already been emptied by the time authorities learned about them, according to the Courant. The good news was, not all of their contents had been incinerated yet, although the garbage had been mashed down to about 6-inch pieces, the paper said.

Workers with heavy equipment were busy peeling back layers of a massive mound of garbage, 20 feet high in some cases and covering half a football field, then setting the German shepherd sniffers loose in hopes of finding such items as bone fragments, the Courant reported.