Yitzhak Herzog
Yitzhak HerzogYonatan Sindel/Flash 90

Opposition leader and Zionist Union chairman MK Yitzhak Herzog confirmed "the door is closed" regarding his party joining the coalition Monday, rejecting via Twitter an offer from Prime Minister Binyamin Netanyahu to resume talks.

"Netanyahu, in response to your inquiries in recent days about resumption of negotiations on joining your government, I want to clarify publicly what I told you verbally: that door is closed," Herzog wrote.

"This chapter is finished. You are a prisoner in the hands of the most extreme and we will fight you - and them," he added, referring to the addition of Yisrael Beytenu. 

Netanyahu stated Sunday that he was leaving the Foreign Minister post open as an incentive for the Zionist Union to resume talks, as he reshuffles his Cabinet ahead of Yisrael Beytenu's joining the coalition.