Police have made two arrests following a knife point robbery last night at West Lakes.

At about 9.30pm, two teenage girls were allegedly threatened by a man and woman wielding a knife as they left work at the West Lakes Shopping Centre.  The suspects fled with wallets and mobile phones.

A police dog patrol tracked the suspects along West Lakes Boulevard, then information from the public indicated they had caught a taxi.

Further investigation led police to unit at Woodville North where both suspects were arrested and the stolen property recovered.

A 32-year-old woman and a 22-year-old man from Grange were both arrested and charged with aggravated robbery and breach of bail.  They have both been refused police bail and will appear in the Port Adelaide Magistrates Court later today.