Police in Nigeria’s largest city, Lagos, have rescued 19 pregnant women during raids at what they call “baby factories”.

The women, aged between 15 and 28 years, were found in four different locations in the city, according to police spokesperson Bala Elkana, who said four children were also rescued.

Most of the women had been abducted “for the purpose of getting them pregnant and selling the babies”, a police statement says.

Two women were arrested during the raids, while the main suspect escaped after getting wind of the police operation.

The police said that male babies would be sold for $1,400 and the females for $830.