Ugandan police have arrested two women, both in their 20s, after neighbours reported seeing them kiss outside, an act criminalised under the country's Anti-Homosexuality Act.

In a statement issued on Tuesday, the police said the pair had been taken into custody on Wednesday 18 February in Arua, a city in north-western Uganda.

Authorities said neighbours had photographed them before alerting police. The women remain in custody without access to legal representation, according to the AFP news agency.

The country's law imposes severe penalties, including life imprisonment, for same-sex relations and the death sentence for what are described as "aggravated" cases.

The police were alerted by neighbours who said the pair had engaged in same-sex behaviour, AFP reports.