LA JOLLA — A man claiming to be armed with a grenade walked into the California Bank and Trust on Wall Street in La Jolla this morning and demanded cash from a teller, according to San Diego police investigators. The man, described as about six feet tall and in his 70s, told the teller that he would shoot if he was handed a “dye pack” (a stack of money armed with a device intended to mark stolen bills by exploding a pack of ink hidden inside the stack). As he left the bank, he placed something under a mat, which he said was a grenade, police said. Investigators, who do not believe the theft was related to the Geezer Bandit series of robberies, were quoted in published accounts that the man was last seen walking east toward Ivanhoe Avenue and was wearing tan pants, a tan fisherman’s hat, a red sweater and sunglasses. Police said no grenade was found. – Kendra Hartmann