Biden received another briefing on the shooting Thursday morning and has ordered the U.S. flag to be flown at half-staff at the White House and all public buildings and grounds, according to the White House.

Source: https://1310kfka.com/abc-news/u-s-news/10/maine-shooting-live-updates-massive-manhunt-continues-for-suspect-as-new-details-emerge/

I’ve ordered the flags at the U.S. Capitol to half-staff as we remember those we lost to the senseless mass shooting in Maine, those who were injured, all their families, and the people of Maine.

Source: https://www.centralmaine.com/2023/10/26/national-leaders-respond-to-mass-shootings-in-lewiston/

"Last week, our flags were at half-staff and this week, diplomatic corps members sign a condolence book for our 3…

Source: https://guardian.ng/news/anambra-attack-us-embassy-thankful-for-rescue-of-two-staff-mourn-with-families/

Last week, Shehbaz Sharif expressed his grief over the tragedy and said Monday would be observed as a day of mourning, with the national flag flying at half-staff.

Source: https://www.pakistantoday.com.pk/2023/06/19/pakistan-observes-day-of-mourning-for-migrant-boat-victims/

President Biden has ordered the flag to be flown at half-staff until May 11 to honor the shooting victims in Allen, Texas.

Source: https://www.nytimes.com/2023/05/08/opinion/letters/allen-texas-mass-shooting.html

US president, Joe Biden has ordered the flags at the White House and all federal buildings be flown at half-staff to honour the victims from Monday’s school shooting in Nashville, Tennessee.

Source: https://pmnewsnigeria.com/2023/03/28/biden-orders-flags-flown-at-half-staff-to-honour-victims-of-nashville-school-shooting/