This happened in New Zealand with possums. Originally intentionally introduced to begin a fur trade industry in the 1800s [0], by the 1960s the Government was undertaking eradication efforts. One of these was a bounty, which resulted in possums being intentionally introduced into Northland so that the bounty could be collected there as well. [1] Northland is "cut off" from the rest of the non-urban area of New Zealand by Auckland, being an urban area from coast to coast. Possums had previously not spread through the city to Northland. The bounty took care of that.

[0] https://teara.govt.nz/en/possums/page-1 [1] https://www.stuff.co.nz/business/2434006/A-hard-road-to-poss...