A police officer has been caught driving while allegedly being more than two-and-a-half times over the legal limit of alcohol on Saturday morning.

It is the latest in a string of drink-driving allegations against four Queensland police officers, including an off-duty officer who was caught last Sunday evening with a blood alcohol content of 0.192.

Police said the 45-year-old male sergeant, who was off duty at the time, was driving a private vehicle which caught the attention of a patrol car in Ipswich.

After making enquiries, police located the accused officer at an Ipswich address and asked him to submit a roadside breath test.

Later, the officer allegedly returned a blood-alcohol reading of 0.133 at a nearby police station.

The sergeant has been issued with a notice to appear in the Ipswich Magistrates Court on August 22, where he will face offences including driving a vehicle whilst over the middle alcohol limit and obstructing police.

The officer has not been stood down from official duty at this time.