Emergency crews are on the scene near Murray Drive

UPDATE: RCMP say Peggys Cove Rd. has now opened.

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Peggys Cove Rd. is closed in the Tantallon area.

RCMP say they're on the scene of an 'unfolding situation' near Murray Drive.

Halifax Regional Fire and Emergency deputy chief Dave Meldrum said crews were called to the post office at around 9:45 a.m. Friday.

"On arrival, they discovered a worker had opened a package and very quickly became ill with vomiting and other symptoms," Meldrum explained.

That employee is being taken care of by EHS and Muldrum has heard they are doing well.

Deputy chief Scott Shaffner, who is at the scene, said six to eight other employees felt nauseous.

"They are stable, they are still on scene under the care of EHS," Shaffter said. "While we don't know what the product is, we don't want to release them just yet."

A Halifax Transit bus has been brought in to shelter them from the weather.

The package is currently outside the building in a containment area and emergency crews -- including a hazmat team, police and fire -- are now trying to figure out what is inside.

"We have a hot zone, we've cordoned it off. The parcel is now in a bin outside of the post office in the parking lot," Shaffner explained. "Our next step is to isolate that and find out what it is."

Shaffner said the road will remain closed until they can ensure the area is safe.