A rescue official says a 50-meter (164-foot) Japanese trawler with 28 fishermen and a dog aboard has run aground off a popular Cape Town beach.

Craig Lambinon, spokesman for the National Sea Rescue Institute, said thick fog may have contributed to the accident early Saturday at First Beach in Cape Town's upscale Clifton area.

He says no one was injured and rescuers took 19 people off the trawler, leaving behind the captain, his dog and a skeleton crew.

Lambinon says the trawler does not at this stage appear to pose an environmental threat.