Deputy Labour leader Harriet Harman is among the prominent figures within the party to have expressed their sadness at the death of MEP candidate Del Singh who was killed in a suicide attack in Kabul yesterday.
Shocked & saddened Del Singh killed in Kabul suicide bombing. My deepest sympathy with his family and friends http://t.co/UoEKzihYlo
Saddened to hear Del Singh one of our MEP candidates has been killed in Kabul. Thoughts with his family.
An attack on the UN is an attack on us all. Our thoughts are with all the families who lost loved ones in Kabul last night.
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Guillier conceded a "severe defeat" defeat to his supporters as the result came in.