Two women in Boston reported ‘spiked’ drinks to police this weekend.
The pair, which were involved in separate incidents, suspected their drinks had been tampered with and were left feeling unwell with their memories affected.
Police say they will investigate to see if offences have occurred and are not releasing further details about the incidents.
Officers want people to be aware of the danger of spiked drinks as the party season approaches.
Inspector Dave Rimmer said: “Reports of drinks being spiked are thankfully rare, but with two such incidents being reported over this last weekend I would urge people to watch their drinks at all times, and not to leave any drinks left unattended”.
Drink spiking is when substances, alcohol or drugs, are added to drinks without knowledge or consent.
Committing the offence with intent to commit a sexual assault or other serious criminal act may result in 10 years in prison.