A 37-year-old man has been arrested in connection with a serious sex assault at knifepoint, police said today.Detective Superintendent Nicholas Pedro added that police had not ruled out more victims.The attack on a 31-year-old woman as she walked to work at about 6.30am last Sunday happened at the junction of Fairylands Road and Pitts Bay Road in Pembroke.The arrested man is from the Pembroke area.Mr Pedro said: “What we have learnt is that the suspect appears to have been loo