LAWRENCE, Kan. -

Investigators say a fire at a University of Kansas fraternity house was caused by improperly disposed of smoking materials.

No injuries were reported after the fire Tuesday at the Sigma Chi fraternity house.

Lawrence-Douglas County Fire official Shaun Coffey said Thursday the fire caused an estimated $150,000 in damage. Flames were contained to the third floor but lower floors had smoke and water damage.

The Lawrence Journal-World reports fraternity members said a bathroom and bedrooms sustained the most damage.

The 74 residents of the home were allowed to return to the house Tuesday evening.

Coffey said he did not know what type of smoking materials caused the fire.

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Members of a fraternity at the University of Kansas are moving back into their chapter house after a minor fire.

6NewsLawrence reports (http://bit.ly/YWHZ9v ) Lawrence-Douglas County firefighters were called to the Sigma Chi house around 11:30 a.m. Tuesday on a report of smoke coming from the third floor.

The fire was under control at 12:30 p.m. and was contained to an area that houses bedrooms and a bathroom.

The university said the 74 residents of the house were able to move back in by Tuesday evening. Four were moving to other rooms in the house.

The Sigma Chi house was also damaged in August 2012 in an accidental fire caused by construction.