Police in St. John's brought one man into custody and were looking for two others after a couple of gas bars were robbed in different neighbourhoods of the city overnight.
An Ultramar station on New Gower Street was held up shortly after 11 p.m. on Wednesday night.
The RNC tracked down a suspect in an abandoned building on Henry Street, also in downtown St. John's.
Around 2:20 a.m. Thursday, two men held up an Irving station at the intersection of Torbay Road and Pearson Street.
Officers found a knife that was used in the robbery, but have not yet located the suspects.
The thieves stole cash and "a quantity of other store items" during the robbery, the RNC said in a statement.
No one was hurt.