Iliana Iotova and Kiril Valchev lead the presidential runoff with 52.5% of the vote, Alpha Research says. The figures are as of 7pm.

The ticket of Andrey Gyurov and Georgi Kandev is second with 43.4%.

The agency says 4.1% of those who voted chose the "I don't support anyone" option on the ballot.

Turnout at the same time was 29.1%.

Follow-up: Yotova leads presidential runoff, two polls show