LOGAN, Utah (AP) — Swarms of green stink bugs have welcomed customers at a Utah gas station.

The Herald Journal reported Wednesday that hundreds of the insects known as Say's stink bugs were reported by residents and travelers at a Chevron gas station.

Officials say the insects aggregated in large numbers partially because of a chemical substance secreted by the bugs in Smithfield about 90 miles (145 kilometers) north of Salt Lake City.

Scientists say various environmental factors contributed to large swarms of insects including a wet spring, a delayed summer and unpredictable rains.

Officials...