the election campaign resumes in britain today after being suspended following the manchester terror attack. also back on this morning, intelligence-sharing between the uk and the u.s. after president trump met with prime minister theresa may and he vowed to plug the leaks that led britain to briefly suspend the intel sharing. >> meantime, a u.s. official tells cnn isis likely trained the manchester suicide bomber when he traveled to syria in the months before the attack. and there's been another arrest overnight in manchester in connection with the bombing. for the latest on all these fast-moving developments, let's bring in cnn's erin mclaughlin live in manchester. good morning to you, erin. >> reporter: good morning, dave. and what's critical here is that investigators seem to be making progress in this investigation into the manchester attacks. that arrest that you just mentioned brings the total number in police custody to eight. they've released two individuals after questioning without charge.