Officials investigated the area of 22nd and Delaware streets on Tuesday after an oily sludge was discovered in the area. A portion of Delaware Street was closed during the investigation.

Fire call

A hazardous materials unit from Olathe was called in Tuesday to clean up sludge in the 2200 block of Delaware Street.

Lawrence-Douglas County Fire Medical hazmat and other units were sent to the area to investigate the material shortly before 9 a.m.

A section of Delaware Street was blocked off.

Lawrence fire officials did not return telephone calls seeking more information about the incident.