The developments in DNA technology threw up a link between Witton Park and another rape attack near Leigh and as a result a link with a family member of the rapist.

BBC: Lancashire - Solving the Witton Park rape

Israel has claimed that Iran and Hezbollah played roles in the attack but investigators in Bulgaria have not made such a link previously, and Hezbollah has denied involvement in the attack.

NPR: Officials: Australian Suspected In Bulgaria Bomb

No Algerian officials have suggested a link between the strike and the attack, nor have they singled out the drivers.

WSJ: Algeria Probes Possible Role of Local Workers in Attacks