A young woman drowned and a man is missing after they were caught inside Prague's drain system by torrential rains while participating in a global GPS-based treasure hunt, police said Sunday.

They were among a group of four people "geocaching" -- using their smartphone's GPS to search for little treasures hidden all over the world -- when the rapidly rising water from the storm trapped them in the Czech capital's underground drainage system on Saturday night.

Prime Minister Malcolm Turnbull would "love" Facebook boss Mark Zuckerberg to be grilled by Australian lawmakers, he said Thursday, in the wake of revelations the tech giant allowed Chinese smartphone makers access to user data.

Facebook on Tuesday confirmed that a Chinese phone maker deemed a national security threat by the US was among companies given access to data on users.

Telegram said Friday that Apple cleared the path for an updated version of the secure messaging app despite a ban in Russia.

Telegram chief Pavel Durov thanked Apple and the California-based company's top executive Tim Cook from his verified Twitter account for "letting us deliver the latest version of @telegram to millions of users, despite the recent setbacks."

Google workers on Friday got word that the internet titan will retreat from a deal to help the US military use artificial intelligence to analyze drone video following an outcry from staff, according to reports.

Fresh from saying "sorry" to European lawmakers, Facebook CEO Mark Zuckerberg holds talks with Emmanuel Macron on Wednesday where he will face renewed pressure over his company's tax policies.

Zuckerberg apologised to the European Parliament on Tuesday for the "harm" caused by a huge breach of users' data and by a failure to crack down on fake news.

Jurors return to a Silicon Valley courtroom Monday to put a price on patented iPhone design features copied by Samsung in a legal case dating back seven years.

The Dutch government is phasing out the use of anti-virus software made by Russian firm Kaspersky Lab amid fears of possible spying, despite vehement denials by the Moscow-based cyber security company.

Facebook pulled or slapped warnings on nearly 30 million posts containing sexual or violent images, terrorist propaganda or hate speech in the first three months of 2018, the social media giant said Tuesday.

New European Union data protection laws take effect on May 25 to protect users' online information, in what Brussels touts as a global benchmark after the Facebook scandal.