Jason Greenblatt — US President Donald Trump’s international negotiations representative — met with Israeli Prime Minister Benjamin Netanyahu in Jerusalem on Tuesday, but remained tight-lipped as to the substance of their discussions.

Greenblatt said on Twitter that he “appreciated” the sit-down with Netanyahu and his staff in advance of further talks when Jared Kushner, Trump’s senior adviser and son-in-law, arrives in Jerusalem on Wednesday.

Earlier, Greenblatt tweeted about his meeting with the prominent Israeli-American political thinker and writer Yossi Klein Halevi, as well as his attendance at Monday’s shiva for Hadas Malka, the 23-year-old Israeli Border Policewoman murdered in a Palestinian terrorist attack in Jerusalem on Friday.

“This violence is intolerable!” Greenblatt wrote.