Timeline: Major attacks on transport sytems around Europe

Two female suicide bombers killed at least 38 people on packed Moscow metro trains during rush hour on Monday, stirring fears of a broader campaign in Russia's heartland by Islamists from the North Caucasus.

Here are some details of major attacks on transport systems in recent years in Europe:

Dec 5, 2003, RUSSIA — An explosion tears through a morning commuter train just outside Yessentuki station in Russia's southern fringe. Forty-six people are killed and more than 160 injured.

Mar 11, 2004, SPAIN — One hundred and ninety-one people are killed and almost 2,000 people wounded in simultaneous bomb explosions in packed rush-hour trains in three Madrid stations. The attack was carried out by Islamist militants, mostly Moroccans. A video message said the attacks were revenge for Spain sending troops to Iraq and Afghanistan. The judge investigating the case said the attack was inspired by, but not ordered by, al-Qaeda.

July 7, 2005, BRITAIN — Four explosions rip through London's underground rail system and buses, killing 52 and the four bombers. Three bombs went off on underground trains heading south, east, and west from King's Cross station. A fourth went off on a bus nearby. Three of the bombers were British Muslims of Pakistani origin from Leeds. The fourth was a Jamaica-born convert to Islam who had been living in Aylesbury, northwest of London. In September, al-Qaeda's second-in-command, Ayman al-Zawahiri, said the group carried out the bombings to strike at "British arrogance".

Feb 6, 2004, RUSSIA — A powerful explosion, apparently set off by a suicide bomber, rips through a packed underground train in Moscow during the morning rush hour, killing at least 39 people and injuring more than 100.

Nov 27, 2009, RUSSIA — A bomb caused the 14-carriage Nevsky Express, with around 700 people on board, to be derailed on the main line between Moscow and Russia's second city, St Petersburg. Twenty-six people were killed and 100 injured near the village of Uglovka, about 350km (200 miles) north of Moscow. Islamist militants later claimed responsibility for the bombing and vowed further "acts of sabotage" in a letter posted on a rebel website.

Mar 29, 2010, RUSSIA — At least two blasts strike Moscow metro stations during rush hour, killing 38 people and wounding 64, many gravely. The first blast tore through a metro train as it stood at Lubyanka station, close to the headquarters of the FSB, successor to the erstwhile KGB. It killed at least 23 people. The second blast was on a train waiting at the Park Kultury metro station, opposite Gorky Park, killed 12 more people, emergencies ministry officials said. Three others died in hospital.