"I believe his involvement played a part in prompting the referral, " match referee Jeff Crowe explained.

BBC: Jaques will join Worcestershire when this tour is over

But the team's manager, Jeff Crowe, said they would call off their Pakistan tour and head back home.

BBC: Karachi bus blast kills 15

"Nathan is flying back to Christchurch where he will be meeting with New Zealand Cricket's doctor, Rob Campbell, for consultation, " said manager Jeff Crowe.

BBC: Astle worry for Kiwis