Armed members of a police special task force entered a Cape Town city centre shop on Wednesday as a hostage situation unfolded.

The city centre was brought to a standstill as traffic was diverted and people barred from the vicinity where robbers stormed into Cash Crusaders on the corner of Long and Strand streets.

A tweet from an onlooker appeared to show one of the hostage-takers being arrested. Police spokeswoman Sergeant Noloyiso Rwexana said that she would provide full details soon.

It was unclear how many people were being held hostage. A witness some hostages had been freed while others remained inside.

Sheldon Cameron tweeted: “Avoid Strand Street in Cape Town‚ there is currently a robbery and hostage situation underway at Cash Crusaders”