Authorities are investigating after five people were seen emerging from a sewer on the Upper East Side early Friday. Police say the quintuplet was spotted exiting the hole on East 82nd Street between York and East End avenues just after 2 a.m. They drove off in a black Suburban, traveling east on 82nd Street. Investigators say they recovered tools at the scene, but they didn’t elaborate. It’s the latest in a series of similar incidents in recent months. Just a few weeks ago, two men seen crawling out of a manhole near East 61st Street while the United Nations General Assembly was underway were arrested on criminal trespassing charges, police said. Authorities don’t believe the so-called “drain diving” is tied to anything nefarious. The NYPD says it has gotten multiple reports about people entering the sewer system after a storm to look for valuables and scrap metal. The department says it has had “a robust response to these incidents” and continues to respond as appropriate. New York City Jun 2 After mystery men emerge from NYC manholes, officials warn of ‘extremely dangerous' sewers New York City Jun 1 ‘Like the Ninja Turtles': New video shows group enter NYC sewer via manhole in Queens Trending news Jun 1 People seen climbing out of Brooklyn sewers pose no threat to public, NYPD says ...read more read less