Turkish Airlines flight number TK-652 travelling from Algiers to Istanbul landed at Istanbul Atatürk Airport at 9.20 p.m., and while 113 passengers were brought to the international arrivals terminal, one bus mistakenly transferred customers to the domestic arrivals terminal.
Some of the passengers were brought back to the international terminal once ground staff noticed the mistake, but an unidentified number of passengers managed to pass through the domestic terminal without security checks.
Police have launched an investigation to identify the passengers who entered Turkey without passport checks.
The incident takes place at a critical time when border control has been stepped up in a bid to prevent foreign fighters from joining the ranks of the Islamic State of Iraq and the Levant (ISIL).
Turkey has recently started to detain individuals deemed suspicious and conduct interviews with a team of criminal profilers before allowing them entry.
According to reports, over 800 people have been deported so far in the scheme, while 200 have been denied entry into the country.