SAN ANTONIO -- Acting on a tip, federal drug agents searched a home and found evidence of what they said was a "significant" steroids operation.

A series of suspicious packages addressed to a home on the 800 block of North Alamo Street prompted Drug Enforcement Agency officials to tag along on a controlled delivery to the home, said DEA agent Deborah Sibila. The delivered packages, Sibila said, contained illegal steroids.

"We're seeing more and more with the steroids here in San Antonio," she said. "The source varies. East coast, west coast."

Believing there were other steroids inside the home, federal agents obtained a search warrant that was executed about 6:20 p.m. Once inside, agents said they found bags of pills, syringes and bags of white powder labeled, "D-Bol." D-Bol is a steroid known as Dianabol Methandrostenalone, Sibila said.

Two men were detained pending testing of the items found in the home and could face multiple federal charges if the substances are steroids, Sibila said. Those results are expected in about two weeks.

Agents also found Winstrol, another steroid, and Clomid, a women's fertility drug typically used by steroid users cycling off the drug and designed to boost the body's natural production of testosterone. The home appeared to be what Sibila called a trans-shipment operation, meaning drugs would allegedly be delivered to the home in its raw form and packaged in pills or liquid.

Federal agents also raided a second home on the city's north side, but declined to release any additional information about the location or result of the raid.