The strike on Northern Bridge comes after repeat attacks on another major bridge in recent days.

The co-ordinated release is aimed at heading off further price spikes and avoiding a ban on US diesel exports.

As of Thursday night, Pike remained critically ill and is being treated at a hospital in Nashville, Tennessee.

A lawyer for Jane Doe says she is "not doing well" amid attempts to uncover her identity.

About 735 schools have faced disruption as violent protests over standards and lack of teachers continue.

The defeat raises pressure on Sánchez to call a snap election, after a series of scandals affecting his party and allies.