An Ebola scare has prompted a Denver hospital to go into temporary lockdown, with emergency crews in hazmat suits responding to the scene, before tests indicated the patient was negative for the virus.

Denver Health Medical Center said on Sunday night that the Colorado Department of Public Health and Environment's tests on the quarantined patient came back negative for Ebola.

No precaution was spared though, when on Sunday morning at around 8.30am a patient who had recently traveled to the Democratic Republic of Congo presented with troubling symptoms.

Officials said the patient had handled the sick and deceased during a recent Ebola outbreak there, which was only declared ended on Wednesday.

An emergency worker in a protective suit is seen outside of Denver Health Medical Center after a potential Ebola patient was admitted on Sunday morning

A medical team in protective gear is seen on Sunday as the hospital went into lockdown

The patient was rushed into an isolation unit and was evaluated in fair condition.

Denver Health Medical Center is one of ten regional facilities in the US that is designated by the CDC for the treatment of Ebola cases.

Emergency crews in hazmat-style suits were seen entering the building on Sunday afternoon by CBS Denver.

The medical facility was briefly put on lockdown, with ambulances diverted to other hospitals, but normal operations had resumed by Sunday afternoon.

In a statement earlier on Sunday, the hospital said that Ebola was 'being considered as a potential but unlikely diagnosis.'

Denver Health Medical Center (above) received a possible Ebola patient at 8.30am on Sunday

This colorized transmission electron micrograph image shows an Ebola virion. Medical teams in Denver responded in hazmat suits to word of a possible Ebola case on Sunday

'From an initial review of the situation and the symptoms presented by the patient, it is unlikely that this will be confirmed as an Ebola case,' said Dr Connie Price, an infectious disease physician and chief medical officer at Denver Health.

The hospital urged calm, saying there was no threat to patients, visitors or staff at the facility with isolation protocols in place.

The Ebola virus is extremely deadly, but is only known to be spread through direct contact with bodily fluids.

The last significant outbreak, which killed 33 people in the Democratic Republic of Congo, was declared over just last week.