Not too many details, but the local all-news station, WTOP, including this story as the lead in their daily news email.
Green paint was splashed at the base of the statue.
Park Police believe the event occurred at about 1:30 AM this morning.
The link I have provided will provide what details WTOP has in their story, as well as a batch of tweets in response to the tail.
The closure is temporary until the paint can be cleaned off.