内容摘要：We asked our readers to send in their best pictures on the theme of "monochrome". Here is a selection of the photographs we received from around the world.

We asked our readers to send in their best pictures on the theme of "monochrome". Here is a selection of the photographs we received from around the world.

The gunman is believed to have escaped on a motorbike and have had at least one accomplice. The possible motive for the killing is still unknown but the attack is the latest in a series of murders of local politicians across the country.Mayor Brugada was visibly upset during a news conference when she recalled how she had "shared dreams and struggles" with her two aides over the years they had worked for her.

She said she would ensure the murders would not go unpunished.President Claudia Sheinbaum was informed of the shooting during her daily morning news conference by the security minister, Omar García Harfuch, who has himself been a target of an armed ambush in the past.President Sheinbaum described it as "a deplorable incident" and offered Mayor Brugada, who is from the same party as the president, all the support she may need.

Police seized a motorbike and another vehicle they think was used in the attack, while forensic experts examined Guzmán's bullet-pierced car.CCTV footage from a nearby building shows a man carrying a motorcycle helmet in one hand and a gun in another, approach Guzmán's car from the front.

He fires through the windscreen, then shoots Muñoz, before again firing at Guzmán.

As he runs away, he turns around and fires another shot at Muñoz, who is collapsing on the pavement.The firm ultimately settled a lawsuit alleging it failed to protect the privacy of nearly seven million customers whose personal information was exposed.

Hackers gained access to family trees, birth years and geographic locations, by using customers' old passwords, but the company maintains the data stolen did not include DNA records.Two months after the settlement, it slashed 200 jobs - about 40% of its workforce.

Ms Wojcicki tried to take the company private but was not open to a third-party takeover.When 23andMe filed for bankruptcy protection in March, attorneys general from multiple US states advised its customers to purge their information from the firm's database.