Searches have been carried out at houses across Manchester by Cumbria and Manchester Police looking for a missing 15-year-old and her baby.
It is believed Catalina Covaci, who is a Romany gypsy, may be with friends or family in the city.
The teenager and her 7-month-old son, Ricardo, disappeared from their home in Penrith in Cumbria more than a month ago.
As well as looking for the pair, officers have been trying to find clothes or documents they could link to them.
PC Karen Singleton from Cumbria Police said:
Police believe a 15 year old girl and her baby son who've been missing for a week could be in Oldham.
Police in Cumbria are now using Twitter to help with their investigation into the disappearance of a teenager and her baby son.