(Want to get this briefing by email? Here’s the sign-up.)

Good morning.

Here’s what you need to know:

• The pieces of a deadly puzzle.

The Times obtained photographs of evidence collected at the scene of Monday’s terrorist attack in Manchester, England, that suggest the bomb was an improvised device made with forethought and care.

Prime Minister Theresa May said today that she would confront President Trump over leaks, attributed to the U.S. government, which British officials blame for news reports, including in The Times, about the investigation. We’re tracking the latest developments.

The authorities are racing to find other parts of a “network” that helped the bomber, Salman Abedi, who recently visited family in Libya. His younger brother and father have been detained there.