Portland police arrested a second man in connection with a string of trash container fires in downtown Portland last month.

Police arrested Aaron Hornbeck-Fielder, 18, of Portland, on Monday and charged him with Class A arson.

Hornbeck-Fielder is charged with setting fire in a large trash container at 121 Center St. early March 23, police said. He is the second suspect charged in connection with the fires, which were set March 22 and 23 at Center Street, Forest Avenue, Commercial Street, Danforth Street and Congress Street.

Police say they believe all the fires are connected.

Police also charged Robert Johnson, 19, with setting a pile of trash on fire near the Portland Museum of Art at 99 Spring St. the night of March 23.