(Philadelphia, PA)  —  There are security concerns today over the theft of more than three-dozen industrial propane tanks.  Officials say they are looking for a man who took 43 tanks of industrial propane gas last week from two commercial facilities in Northeast Philadelphia.  Police say surveillance video shows the suspect stealing the tanks from a business in the 23-hundred block of Church Street and from a second establishment in the 47-hundred block of Pennypack Street.  According to investigators, the tanks weigh between two pounds and 100 pounds and can be used on large industrial projects.