Kasun Rajitha claimed two wickets in the morning session as Sri Lanka moved closer to victory in the first Test against Bangladesh on the fourth day in Sylhet on Monday.

The visitors reduced Bangladesh to 129-7 at lunch, with the hosts still needing another 382 to reach their improbable victory target of 511 runs.

Overnight batsman Mominul Haque delayed the inevitable and was unbeaten on 46 at the break alongside Shoriful Islam, who had made three.

Rajitha claimed the wicket of Taijul Islam in the third over of the morning, trapping the left-hander in front for six.

But Mominul, who hit six fours, put on a dogged 66-run partnership with Mehidy Hasan Miraz for the seventh wicket before Rajitha struck again.

Mehidy, on 33, edged Rajitha to Dhananjaya de Silva at second slip.

Taijul and Mominul resumed Bangladesh's innings at 47-5 after the top order collapsed in little over an hour before the close on Sunday.

Sri Lanka, who have never lost a Test series in Bangladesh, made 280 in their first innings and Bangladesh replied with 188.

The visitors then made 418 with first innings centurions de Silva and Kamindu Mendis both reaching three figures for the second time in the match.

They were only the third pair from the same country to score centuries in each innings of a Test after Australia's Chappell brothers, Greg and Ian, and Pakistan's Misbah-ul-Haq and Azhar Ali.

The second and final match of the series will be played in Chittagong from March 30.