Officials investigating a possible terror strike by Afghan nationals in New York, on Wednesday searched the Denver, Colorado, apartment of an Afghan man who recently traveled to New York.

The man, Naijbullah Zazi, was not at the Denver apartment when the FBI arrived. His attorney said earlier that Zazi had stayed in an apartment in New York that was raided this week.

As activity increased at the Denver apartment on Wednesday, FBI spokeswoman Kathleen Wright told CNN a search warrant was being executed. At least one law-enforcement dog could be seen, and agents were wearing hazardous material suits.

At least two women were brought out of the apartment. Agents evacuated the complex, which has about 12 units, as a precaution, the FBI said.

Agents also searched a single-family home in the Denver suburb of Aurora later Wednesday, FBI spokeswoman Kathleen Wright said.

On Monday, several apartments in the New York borough of Queens were raided by investigators from the federal Joint Terrorism Task Force, sources close to the investigation said.

They were acting on suspicions that a cell of Afghan nationals associated with a New York-area mosque might be plotting to carry out a terrorist strike in New York. It’s believed to be the first time Afghan nationals are suspected of involvement in a terror plot targeting the United States, a source with direct knowledge of the investigation said.

However, FBI director Robert Mueller, asked about the matter Wednesday at a Senate Judiciary Committee hearing, said, “I can say that I do not believe there’s imminent danger from that particular investigation — from what I know of that particular investigation.”

(Source: CNN)