Security tightened at Boston Calling over ‘Molly’ concerns ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page Emily Wright/Boston.com staff The two-day Boston Calling Music Festival returned to City Hall Plaza after May's inaugural event. Josh Reynolds for The Boston Globe Security was tightened because of recent drug overdoses at concerts in Boston and New York, organizers said. Matthew J. Lee/Globe Staff Tickets were still available Saturday evening for Sunday's performances. Matthew J. Lee/Globe Staff Local Natives will head on to St. Louis for LouFest. Pictured: Lead singer Taylor Rice. Matthew J. Lee/Globe Staff The Gaslight Anthem was one of the acts to perform at the festival. Matthew J. Lee/Globe Staff Vampire Weekend concluded Saturday along with The Gaslight Anthem. Pictured: Ezra Koenig of Vampire Weekend. Alexa Dibenedetto/Boston.com correspondent Bearstronaut performed during the festival's second day. Pictured: David Martineau. Alexa Dibenedetto/Boston.com correspondent Royal Teeth got the crowd to sing along. Josh Reynolds for The Boston Globe Ben Shipley of New York City and Blair Nodelman of Albuquerque, N.M., were at City Hall Plaza on Sunday. Alexa Dibenedetto/Boston.com correspondent Big Black Delta's next performance is Sept. 17 in Los Angeles. Pictured: Lead singer Jonathan Bates. Matthew J. Lee/Globe Staff Fans enjoyed the music of Major Lazer during their performance Sunday. Matthew J. Lee/Globe Staff Diplo (right) and Walshy Fire of Major Lazer got the crowd going. Matt Juul/Boston.com correspondent A huge crowd gathered to watch rapper Kendrick Lamar perform. Matthew J. Lee/Globe Staff Lamar will perform Monday at Brooklyn's Williamsburg Park. Matthew J. Lee/Globe Staff Homegrown group Passion Pit was one of the headlining acts. The other was Vampire Weekend. Pictured: Lead singer Michael Angelakos.