While such killings are generally on a small scale, the worry that these pelicans over-exploit the fishing stock persists in many locales.

But worries about a flare-up of inflation persist and critics charge that the gains are largely based on external factors.

No replacement plan exists, however worries persist that the political vacuum will result in renewed fighting.

But worries persist about whether the reservoir represents a health threat.

But worries persist that Seoul will have difficulty down the road.

At the same time, inflationary worries persist.

Meanwhile, worries persist about the state of the reactor cores on the site.

The euro stayed near seven-week lows against the dollar on Thursday as worries over the crisis persist.

Officials tried to play down the incident, but worries persisted that the full story wasn't being told.

Still, worries persist over historically high natural gas prices as the fall and winter heating seasons approach.