To learn much more background about why Brianna Wu and her husband had to flee her Arlington home, read the Oct. 30 Globe story >>

When interviewed, Wu remained at an undisclosed safe house. 

Brianna Wu, at left, with a poster of some of her video-game characters. / Globe photo, Joanne Rathe

UPDATED, Oct. 30: Police are investigating sexual assault and death threats made via Twitter to an Arlington-based video-game developer, which forced the family to temporarily leave their home briefly, officials have told The Boston Globe.

"The Arlington Police Department takes these actions very seriously and will aggressively pursue whoever is behind these threats using all available tools and partnering with federal law enforcement if necessary," John Guilfoil, speaking for the Arlington police on Sunday, Oct. 12.

He declined to identify the family, but various sources, including Fox News, have reported the developer is Brianna Wu, head of development at Boston-based Giant Spacekat.

In a report with a photo, WCVB said the couple fled briefly the night of Saturday, Oct. 11. Many of the Twitter posts attacked Wu for her role as a feminist, WCB reported.

Wu was targeted after tweeting a series of images critical of those who identify with the GamerGate campaign, reported.

Police Chief Frederick Ryan said in a statement that the department is actively pursuing any leads to find the identity of the perpetrator.

"We will follow this case wherever it takes us and pursue anyone who threatens the safety and security of our residents," The Globe quoted him.

This story was published Monday, Oct. 13, 2014, and updated Oct. 30.

Note: The original headline said the couple left home briefly, which was based on initially reported information.