MK Isaac Herzog, the Israeli opposition leader, has been named as the second politician under investigation for corruption.

Amit Segal, political correspondent of Israel’s Channel 2, tweeted that according to initial reports the opposition chief “is the second person tested by law enforcement”. He joins the Interior Minister Aryeh Deri, who revealed last night that police had been conducting preliminary investigations into him as part of a separate case.

Mr Herzog, the leader of the Labour party, denied the allegations in a tweet, saying: “I welcome the review carried out by the Attorney-General message. It is a political smear campaign and Likud activists frustrated trying to spread before the elections and denied back then.”