It has been reported that the evacuation was ordered after two men went missing inside the stadium.
The two men were reported to have done so at 1.30pm, and Merseyside Police were called to the stadium at 3.05pm as a consequence.
“There is an incident at Anfield stadium, and as a precautionary measure the facility has been evacuated,” said a club spokesman.
“Our priority is to ensure the safety and well-being of everyone at the ground. The emergency services are aware of the situation.”
Merseyside Police released a statement on Tuesday evening which read:
“Merseyside Police can confirm officers are in attendance following security concerns at Anfield Stadium today (Tuesday, 27 October).
“As a precautionary measure, the club has evacuated the stadium and officers are now carrying out enquiries at the scene.
“Anyone with information about the incident is asked to call police on the 101 number or Crimestoppers, anonymously, on 0800 555 111.”
Photos were posted on social media and in local news blogs appearing to show club staff and tourists standing outside the ground with police officers manning the gates to the ground.
Liverpool are due to face Bournemouth in the fourth round of the Capital One Cup at Anfield on Wednesday night.