South Korean investigators have raided the shipping safety watchdog as part of their growing probe into the sinking of the Sewol ferry.
"The objective was to investigate malpractices and corruption in the entire shipping industry," said Song In-taek, head deputy chief prosecutor at Incheon District Prosecution Service.
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The operation to recover the unexploded bomb near the Houses of Parliament let to disruption in central London overnight.
Southern parts of England and Wales will see sunny skies after a frosty start.
A police spokesman said the incident in the Bourke Street Mall on Friday was not related to terrorism.