Updated 04:17 p.m., Monday, September 12, 2011

NEW YORK (AP) - Mayor Michael Bloomberg and other mayors in support of gun control are speaking out against a bill that would allow licensed gun owners to carry concealed firearms across state lines.

Mayors Against Illegal Guns launched the "Our Lives, Our Laws" campaign Monday against H.R. 822, the National Right-to-Carry Reciprocity Act of 2011. If passed, someone allowed to carry a concealed weapon in his or her home state could do so in any other state.

The mayors' group says the act would prevent states from setting standards for concealed weapons and would force them to accept whatever standards the most-lenient state uses.

The bill is supported by the National Rifle Association. The organization says the bill allows owners to protect themselves in other states.

A hearing is scheduled for Tuesday.