Istanbul consulates on alert after yellow powder sent

Envelopes containing an unknown yellow powder have been sent to five consulates in the Turkish city of Istanbul, officials say.

The US, Canadian, Belgian, German and French missions all received the packets, prompting security alerts.
Sixteen people who had been exposed to the powder were hospitalised as a precaution, the health ministry said.
The government has despatched chemical, radioactive and nuclear specialists to investigate.
The Canadian consulate was closed for the day after one person was reportedly directly exposed to the powder.
The German consulate said staff had been evacuated.
"We were told that an envelope was received, it contained a powder and it was dangerous. So we were sent home," a staff member said.