DALLAS (AP) — Officials say someone has vandalized a statue of Confederate Gen. Robert E. Lee at a park named in his honor in Dallas' Oak Lawn neighborhood.

Dallas police say they received two calls Friday morning after people say they saw the word "shame" spray-painted on the base of the statue. The city's Park and Recreation Department had workers use a power washer to clean the statue later that morning.

An investigation is ongoing.

The Lee Park and Arlington Hall Conservancy, which is the group that maintains the park, said in a statement that the act creates alarm, not dialogue. Two weeks ago, the conservancy said they support open dialogue and peaceful debate after a small group of protesters gathered at the statue to hold an "un-dedication" ceremony.

Copyright 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.