12 people died Death and 46 were injured Bodily_harm as a result of a rear-end collision in a tunnel , caused Causation by driver error after a signal failure .

On 7 July , after seven Hamas militants died Death in a tunnel explosion Attack in Khan Yunis which was caused Causation by an Israeli airstrike Attack ( per Hamas , Nathan Thrall , BBC and a senior IDF official ) or an accidental explosion Attack of their own munitions ( per the IDF ) , Hamas assumed Protest responsibility for rockets fired Use_firearm into Israel and launched Military_operation 40 rockets towards Israel .

The operation Military_operation officially began Process_start the following day , and on 17 July , the operation Military_operation was expanded Expansion to an Israeli ground invasion Military_operation of Gaza with the stated aim of destroying Destroying Gaza 's tunnel system ; Israeli ground forces withdrew Escaping on 5 August .

According to the Israeli government , the operation began Process_start in response Response to the launch of over 100 rockets at Israel during a 24-hour period , an attack Attack by Gaza militants on an Israeli military patrol jeep within Israeli borders , and an explosion caused Causation by IEDs , which occurred near Israeli soldiers , on the Israeli side of a tunnel passing under the Israeli West Bank barrier .

It was Switzerland 's second-worst road accident Catastrophe in history and the country 's worst in a motorway tunnel .

Heavy fighting resulted in Causation significant casualties Bodily_harm on both sides , but the combined American and Australian force was able to uncover Reveal_secret an extensive tunnel network covering Hiding_objects more than .

The British reopened Openness the tunnel beneath the Hawthorn Ridge crater three days later and reloaded the mine with explosives for the Battle of the Ancre .

In the tunnel after the match Competition tempers boiled over between staff of both clubs Becoming_a_member , and amid the brawl a slice of pizza was thrown Motion at Manchester United manager Sir Alex Ferguson , allegedly by Arsenal midfielder Cesc Fàbregas .

The crash forced Motion the first carriage into the roof of the tunnel at the front and back , but the middle remained Presence on the trackbed ; the coach was crushed Bodily_harm to .

With no services running into the adjoining platform to create the piston effect pushing air into the station , ventilation was poor and temperatures in the tunnel rose to over .

A train ran Motion into the back of another inside the tunnel , killing Killing 23 and injuring Bodily_harm 176 passengers .

at the southern entrance Arriving to clayton tunnel an automatic signal failed to return Arriving to danger after the first train passed Motion_directional , allowing Preventing_or_letting the second train to follow Motion it into the tunnel .

at the southern entrance Arriving to clayton tunnel an automatic signal failed to return Arriving to danger after the first train passed Motion_directional , allowing Preventing_or_letting the second train to follow Motion it into the tunnel .

The signaller at the south end Process_end of the tunnel belatedly waved Body_movement a red flag in an attempt to stop Preventing_or_letting the second train , but thought that it had not been seen Perception_active .

However the driver of the second train had briefly glimpsed Perception_active the flag and stopped Preventing_or_letting his train inside the tunnel .

The signaller then misinterpreted a 'line clear ' telegraph message from the signal box at the north end Process_end of the tunnel as referring to the second train instead of the first , and signalled Communication the third train into the tunnel .

The signaller then misinterpreted a 'line clear ' telegraph message from the signal box at the north end Process_end of the tunnel as referring to the second train instead of the first , and signalled Communication the third train into the tunnel .