Merseyside Police confirmed they were called to the ground-floor flat in Falkner Street, Toxteth, at around 7.30pm following reports of concerns for the safety of the occupants.
The suspect was taken to hospital shortly after being arrested due to illness.
BING*GETTY FILE IMAGE
Police were alerted to an incident in Toxteth, Liverpool
Officers said they believed the incident is “domestic related” and added they were not looking for anyone else at this stage.
Falkner Street residents had been evacuated from their homes earlier on Tuesday evening following concerns about a fuel leak.
Falkner Street in Liverpool
Residents have now been allowed to return to their properties, with the exception of the properties either side of the address.
Police closed the street and urged people in neighbouring roads to remain indoors and keep windows closed.
Express.co.uk has contacted Merseyside Police for comment.