(May 24, 2021, 9:20 PM EDT) -- PITTSBURGH — An insurer says in a suit filed in federal court in Pennsylvania on April 30 that it has no duty to defend developers in an underlying action brought by a homeowners association over landslides that occurred in 2006, 2015 and 2017, arguing that the 2006 landslide was not an occurrence under the policy and that the later landslides are not covered because there was no active policy in place....