Mark Williams of Wales was in fine form as he beat compatriot Jackson Page ©Getty Images

Mark Williams of Wales was in fine form as he thrashed compatriot Jackson Page 13-3 to reach the quarter-finals of the World Snooker Championship in Sheffield.

But the highlight of the day was when a pigeon interrupted the second-round fixtures at the Crucible, where Mark Selby of England was taking on Yan Bingtao of China.

The bird was walking on the table before flying to Selby, who was surprised by the incident.  

Selby and Yan were tied at 4-4 after the first session before resuming on Saturday morning.

Meanwhile, Williams who will face Selby or Bingtao next, made six centuries and eight breaks of 50 as he crushed Page with a session to spare.

England’s Ronnie O'Sullivan, up against Norther Ireland’s Mark Allen, is one frame away from sealing a spot in the quarter-finals.

Six-time champion O'Sullivan cruised to a dominating 12-4 lead at the end of the day.

However, Allen started the first session in dominating fashion to go up 6-2.

In the 12th frame, O'Sullivan who was on for a maximum 147 break, lost position after potting 11 reds and 11 blacks.

But a classy 100 break in the final frame of the second session put the 46-year-old O'Sullivan in the lead.

Scotland’s Stephen Maguire needs only two more frames to reach the last-eight after a 11-5 lead over Zhao Xintong of China.