The new year is less than a week old, but UK online gambling operators are already under renewed regulatory assault.

On Friday, the UK Gambling Commission (UKGC) posted a notice indicating that it had “begun investigations into 17 online operators, and are considering whether five of these require a license review.”

The UKGC declined to identify either the 17 operators under investigation or the five who may face a license review. The regulator did say that the investigations followed the “serious nature of our findings” from the UKGC’s thematic review of the online sector’s “approach to anti-money laundering and social responsibility.”

The UKGC also published a letter it says it sent to all UK online casino licensees instructing them to review their own processes for “customer interaction and anti-money laundering.”