LOWER SOUTHAMPTON, Pa. (WPVI) -- One person was killed in an accident involving a modified electric bicycle in Lower Southampton, Bucks County.Witnesses said around 2 p.m. Monday the man riding the bicycle was traveling west on Street Road in Lower Southampton.As the man on the motorized bicycle was crossing the intersection at Central Avenue, witnesses said the driver of a rented transit van traveling in the opposite direction turned left right into the path of the oncoming bike.Paramedics arrived moments later, but the man on the motorized bike was pronounced dead on the scene.He has been identified as 50-year-old Matt Petcel.The impact damaged the van's passenger side door, but no other injuries were reported.The ensuing police investigation resulted in a backup in both directions along Street Road, a very busy thoroughfare through this part of Bucks County.Investigators said they're still not sure who was at fault here.----------