A suspect who allegedly shot dead a Texas Tech University police officer Tuesday morning (Pakistan time) at one of the campuses was apprehended almost an hour later, the institute's Twitter account said in an update.

Earlier, it was reported that a Texas Tech University police officer was shot at by a suspect who was brought into the nearby police station for questioning and who subsequently fled the scene.

The university issued an "all-clear" following the suspect's detention, saying the lockdown has been lifted.

The suspect was reportedly brought to the nearby police station for a "debriefing" when he fatally "shot an officer [and] fled on foot".

The incident was confirmed by Jonathan Seaborn ? the university's spokesman ? to CNN.

In the tweet, the university had urged its students to "take shelter", since the "shooter [was] at large".

Texas Tech University subsequently issued a statement, which is as follows:

"Earlier this evening, Texas Tech Police made a student welfare check. Upon entering the room, officers found evidence of drugs and drug paraphernalia. Officers brought the suspect to the police station for standard debriefing. During this time, the suspect pulled a gun and shot an officer in the head. The officer is deceased.

"The suspect fled on foot and is currently still at-large. Texas Tech University campus is on lockdown. We will update as more information becomes available."

?This is a developing story and will be updated as more information is available