LYNN, Mass. -- A security breach at a liquefied natural gas storage facility in Lynn is under investigation after two people climbed to the top of a KeySpan tank.

Several months ago, NewsCenter 5's Sean Kelly reported, Team 5 began investigating the security cameras at LNG sites, specifically asking questions including: Who, if anyone, is actually watching the feed from the video cameras? And if they are watching, why does it take so long to respond?

The state ordered increased security at all LNG plants after two men cut the chain link fence at the Lynn tank and climbed on top of it last week. Police investigators were at the scene Wednesday taking pictures of the tank and a gate that was breached.

"My heating bill hasn't gone down, so I would think there would be as little money left over for security and protection for their neighbors and the people who pay their bills," said business owner Michael Mahoney.

Security cameras took pictures of the intruders, but they have not been caught. KeySpan reported the incident five days after it happened.

In April, Team 5 investigated security at other LNG facilities, including a site in Dorchester. Team 5 found no security officer at the gate, and it took about 10 minutes for someone to ask why a photographer was talking pictures of the facility.

"We are aware of the breach. We have notified all appropriate public safety authorities. We have been conducting an intensive internal review of our security. There is no damage to our facility," KeySpan said in a statement Wednesday.

That gives little comfort to neighboring business owners.

"My whole life savings is in this building and I would be freaked out if I'm within the crater that would be left. I would have to review my insurance coverage," said business owner David Zeller.

Lynn police has been contacted by KeySpan to provide on-site detail officers. The Lynn mayor said he has not talked to KeySpan directly, but he does not believe there is an added security risk.