By Nour Malas and Amir Efrati

An executive for Google Inc. is missing in the wake of Egypt's tumultuous protests, according to his brother. Wael Ghonim, whose LinkedIn profile says he is head of marketing for the Middle East and North Africa at Google, hasn't been heard from since Friday at 6 p.m., his brother Hazem said. Hazem said the family is in touch with Google.

A Google spokesman said: "We care deeply about the safety of our employees."

Wael Ghonim's web postings suggest a deepening engagement with politics. His Facebook page lists opposition figure Mohamed ElBaradei as a person he admires, along with Bill Gates, Warren Buffett and Steve Jobs. In mid-January he tweeted that he was traveling to Qatar to participate at an Internet freedom forum hosted by network Al Jazeera.

Later, he sent a tweet that said he was going to join the Egyptian protests despite "all the warnings I got from my relative and friends."