GRAND JUNCTION, Colo. -- There was still no sign of a 34-year-old Grand Junction mother and her 6-year-old daughter Thursday, both of whom were apparently snatched from their upscale home after a violent struggle.

Jennifer Blagg and her daughter, Abby (pictured, left), were reported missing Tuesday. Michael Blagg came home from work and found a pool of blood in the master bedroom, and his wife and daughter gone.

"There was obviously some kind of violent event inside the home," said Janet Prell, spokeswoman for the Mesa County sheriff's department. "There was a significant amount of blood."

Blagg is a stay-at-home mother and Abby attended Bookcliff Christian School.

The mystery deepened Wednesday when investigators revealed that Abby was excused from school on the day she vanished.

Someone called Bookcliff School Tuesday morning to report that Abby (pictured, right) would not be attending classes that day, Prell said. Investigators don't know who called the school, she said.

Jennifer Blagg's car was still in the garage.

Investigators were interviewing neighbors, associates, and friends to reconstruct their daily routine and to learn who may have visited the house.

"Basically we're looking at them as a family and trying to understand their lifestyle," Prell said.

Authorities also used bloodhounds to search for the two along the Colorado River near their house.

Blagg told investigators he left for work at 6 a.m. He called police at 4:20 p.m.

Blagg works as a manager at the Dixson Division of AMETEK Inc., which designs and manufactures instrumentation, controllers and display systems.

He is not a suspect, Prell said.

"He's being very cooperative," she said.

Investigators won't say whether there were signs of forced entry into the Blagg home.

Anyone with information about the case is asked to call the sheriff's department at (970) 244-3500 or Crime Stoppers of Mesa County at (970) 241-7867.