ARLINGTON, Texas -- Police said Thursday they have shut down a major drug operation that they said shipped anabolic steroids to people all over the country.

Undercover officers with Tarrant County's Narcotics and Organized Crime Unit have been investigating for months, NBC 5 reported. This week, they said they hit the jackpot.

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VIDEO: Police Shut Down Major Steroid Operation

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Police said they arrested Steven Vaughn and his wife, Alice. Their four children, who range in age from 3 to 13 years old, were placed in foster care. Drug agents said they were analyzing seized computer files and have arrested others as far away as Michigan and California.

Police said a trailer home overlooking Lake Arlington was a laboratory for making anabolic steroids on a massive scale.

"As far as the manufacturing and how they manufactured it and the sophistication of the bottles and the labeling, it is one of the bigger ones that we've got here," said Herschel Tebay, the unit's commander.

The bottles sell for approximately $100 apiece, and authorities said the street value of the steroids confiscated was at least $500,000. Investigators said the steroids were marketed over the Internet and sold to people all over the country.

In a raid on Monday, police also found guns (no comma) and all of the tools of an amateur chemist.

Steroids have been in the news lately, with San Francisco Giants slugger Barry Bonds, who recently set the all-time home run record, being clouded by controversy about whether he used steroids. Also, tests showed professional wrestler Chris Benoit had high levels of testosterone when he killed his wife, son and himself in the family's home near Atlanta.

"Heroin, cocaine and meth get the headlines," Tebay said. "But anabolic steroids have caused a lot of concern in the community."