Update 2:10 p.m.: City officials have lifted the shelter in place order.

Posted: 1:56 p.m.

The Pflugerville Police Department and Travis County ESD #2 are on the scene of a chemical explosion that has caused an ammonia smell in a 1/2-mile radius of Wiseman and Dashwood. The area is near West Pflugerville Parkway and North Heatherwilde Boulevard.

Officials from the city of Pflugerville said residents in that area have been asked to shelter in place.

The city said there is a water pump station near a subdivision at the location and a chemical distribution company was working with liquid ammonia sulfate, causing a reaction that under pressure ruptured and created the chlorine smell.