A former Lib Dem MEP, Ed McMillan-Scott, has criticised a Jewish Community group and the editor of the Jewish Chronicle newspaper in tweet.
The tweet was deleted shortly after being posted, and an apology was issued this morning.
ITV News are awaiting a response from the Liberal Democrats.
The comments were in response to comments posted on Twitter yesterday from Liberal Democrat MP David Ward, who said he would "probably" fire a rocket at Israel if he lived in Gaza.
More top news
Pair charged after woman was found being held in conditions of 'domestic servitude' in the Manchester area, police said.
The men were held over a stash of thousands of gun cartridges and more than 20 pistols and rifles, coastguards said.
James Greig asked his girlfriend to marry him on the front cover of the Observer magazine, so did she accept?