Local police are appealing to parents to be more vigilant when it comes to knowing the whereabouts of their teenage children, especially on a Friday night. Problems with anti-social behaviour and underage drinking by gangs of teenagers are continuing to cause a headache for local officers in Tenby. "Warnings are just not getting through," said WPC 914 Trish Dixon this week, "and if these problems continue, we may have to start making arrests."