Pittsburgh ToonSeum: Comic Books Damaged By Museum Roof Leak

03/06/2012 05:27 pm ET | Updated May 06, 2012

PITTSBURGH -- Holy leaky roof, Batman!!!

Hundreds and possibly thousands of rare comic books were damaged at a comic museum's warehouse in western Pennsylvania last week.

Executive director Joe Wos says the most valuable comics weren't at the warehouse, but some of what was lost will be "very difficult to replace." He says much of the material was waiting for transfer to the ToonSeum's new on-site library.

The ToonSeum is one of only three museums in the country dedicated exclusively to the cartoon arts.