Captain Inzamam-ul-Haq scored a record equalling 23rd century as Pakistan made 462 before reducing England to 113 for three at close of play on the second day of the second test on Monday.
Ian Bell (36) and Kevin Pietersen (four) were batting together for England when bad light stopped play.
The England innings was suspended for nine minutes when a gas cylinder exploded in front of a packed stand. A policeman standing on the edge of the ground suffered minor injuries.
"It was purely accidental. The explosion occurred because a carbonated gas cylinder exploded as it could not take the pressure," senior police official Amin Watoo told Reuters.
Pakistan paceman Rana Naved bowled Andrew Strauss (12) and captain Michael Vaughan (two) in successive overs to leave England struggling on 39 for two.
Mohammad Sami struck just before close when he got opener Marcus Trescothick to inside edge to wicketkeeper Kamran Akmal on 48.
Akmal dived to his right to take the catch low off the ground as Trescothick fell after facing 115 balls and hitting eight fours in 150 minutes of batting.
Earlier, Inzamam had made 109 to equal Javed Miandad for the most test centuries by a Pakistani, while Shahid Afridi plundered 92 to take the team to an imposing total.
The Pakistan skipper was run out in controversial fashion by Steve Harmison when the fast bowler threw down the stumps off his own bowling and Inzamam, in avoiding the ball, momentarily lifted his foot and left the crease.
The third umpire ruled him out although cricket laws state that a batsman can not be dismissed in such circumstances.
"I was just avoiding the ball and in the (rule) book it says that's not out," Inzamam said.
Pakistan are 1-0 up in the three-match series.
Scorecard
Pakistan (1st innings): (Overnight: 300-4)
S. Malik c Flintoff b Hoggard 27
S. Butt c G. Jones b Harmison 26
Y. Khan c Pietersen b Flintoff 7
M. Yousuf c&b Bell 78
Inzamam-ul Haq run out 109
S. Afridi c Trescothick b Hoggard 92
K. Akmal c G. Jones b Giles 41
Naved-ul-Hasan b Harmison 25
M. Sami c&b Giles 18
S. Akhtar c Flintoff b Harmison 12
D. Kaneria not out 4
Extras: (b-5, lb-3, nb-15) 23
Total: (all out, 115.4 overs) 462
Fall of wickets: 1-53, 2-63, 3-73, 4-201, 5-346, 6-369, 7-403, 8-431, 9-446, 10-462.
Bowling: M. Hoggard 22-0-115-2 (nb-12), A. Flintoff 29-2-76-1 (nb-3), A. Giles 20-1-85-2, S. Harmison 24.4-5-85-3, S. Udal 13-1-60-0, I. Bell 7-1-33-1.
England (1st innings):
M. Trescothick c Akmal b Sami 48
A. Strauss b Naved-ul-Hasan 12
M. Vaughan b Naved-ul-Hasan 2
I. Bell not out 36
K. Pietersen not out 4
Extras: (nb-10 w-1) 11
Total: (for 3 wickets, 36 overs) 113
Fall of wickets: 1-33, 2-39, 3-107
To bat: A. Flintoff, G. Jones, A. Giles, S. Udal, M. Hoggard, S. Harmison.
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