Agency investigating 20 other projects related to the case - Azam.

Both suspects are thought to be linked to a prominent opposition leader.

Annual 10-20 nesting grounds now down to five, groups say.

They are concerned with soil erosion and environmental pollution.

Why mega goat farm allowed on mostly uninhabited island - Sabah reps.

An activist group claims it's being done without a permit.

Company reps block the roads with bulldozers.

Legal action was over comments, articles regarding sand mining.

Mining has been happening since June, with residents unconsulted.

Some of the sand concessionaires include royalty-linked firms.

Sand is the second-most exploited natural resource, replenishment difficult.

Stakeholders say royal-linked sand mining project hurting fisherfolks, environment.

'Irresponsible parties have no respect for supremacy of law.'

Authorities say there was no approval or permission issued.

Manjung Municipal Council says permit issued by land and mines office.

Mining in coastal areas has extended to the entire state, he says.

'The world is running out of sand, and many countries have started imposing bans on exports.'

Singapore-registered dredging company Starhigh Asia Pacific says erosion was present in the area before work started.

LETTER | Reclamation projects in Penang waters have led to markedly reduced catches by coastal fishermen.

The move could complicate Singapore's land reclamation efforts, but the PM's aide denies it's aimed at curbing the city-state's expansion.

UPDATED 5.08PM | Elected representative is one of the leaders under investigation for corruption and abuse of power.

All mining operations are according to rules and regulations.

COMMENT | And it is clear that Menteri Besar Ahmad Faizal Azumu does not have the people's support in what he's doing to Perak.