ISTANBUL (Reuters) - Access to social media sites Twitter and Whatsapp was blocked in Turkey on Friday, an internet monitoring group said, following the detentions of 11 pro-Kurdish lawmakers in the mainly Kurdish southeast overnight.

Access was being blocked by throttling, an expert from the monitoring group Turkey Blocks said, a method of slowing certain websites to the point where they are unusable.

(Reporting by Can Sezer; Writing by Humeyra Pamuk)