Nick Miles

Iran is notorious for its tight grip on security. There are numerous different police units and paramilitary groups. So with that level of social control, how did a gunman manage to get inside the Supreme Court building in Tehran and kill two senior Iranian judges? Sirvash Adelan from the BBC Persian service told me what happened.

Iran is notorious for its tight grip on security. There are numerous different police units and paramilitary groups. So with that level of social control, how did a gunman manage to get inside the Supreme Court building in Tehran and kill two senior Iranian judges? Sirvash Adelan from the BBC Persian service told me what happened.

Are attacks on judges, particularly those involved in anti-opposition persecutions, fairly common in Iran?

Are attacks on judges, particularly those involved in anti-opposition persecutions, fairly common in Iran?

And one imagines, if it's possible now, that the authorities in Tehran will want to step up security in key areas, particularly court buildings.

And one imagines, if it's possible now, that the authorities in Tehran will want to step up security in key areas, particularly court buildings.

Sirvash Adelan from BBC Persian. As we record this podcast, Donald Trump is due to arrive in Washington for the build-up to his US presidential inauguration on Monday. On Saturday, there was a scheduled fireworks display and a reception for Republican donors, with more events planned on Sunday. But not everyone is happy, of course.

Sirvash Adelan from BBC Persian. As we record this podcast, Donald Trump is due to arrive in Washington for the build-up to his US presidential inauguration on Monday. On Saturday, there was a scheduled fireworks display and a reception for Republican donors, with more events planned on Sunday. But not everyone is happy, of course.

A coalition of protest groups took to the streets on Saturday, as our correspondent Caroline Hawley reports from the US Capitol.

A coalition of protest groups took to the streets on Saturday, as our correspondent Caroline Hawley reports from the US Capitol.

Caroline Hawley in Washington. Scottish scientists are searching more than nine kilometres under the sea in some of the deepest ocean trenches for what's being called dark oxygen. Discovered last year between Hawaii and Mexico, this mysterious oxygen appears to be produced on the seabed without sunlight. Here's our science correspondent, Victoria Gill.

Caroline Hawley in Washington. Scottish scientists are searching more than nine kilometres under the sea in some of the deepest ocean trenches for what's being called dark oxygen. Discovered last year between Hawaii and Mexico, this mysterious oxygen appears to be produced on the seabed without sunlight. Here's our science correspondent, Victoria Gill.

Still to come.

Still to come.

Now a chief minister in India has offered $1 million to anyone who can decode the mysterious symbols of the Indus script.

Now a chief minister in India has offered $1 million to anyone who can decode the mysterious symbols of the Indus script.

Three people have been killed in a Russian missile attack on the centre of the Ukrainian capital Kiev. President Zelensky said civilian structures, including a metro station, were damaged. Russia says it was targeting a missile factory in retaliation for Ukrainian attacks on its territory. Our Eastern Europe correspondent Sarah Rainsford is in Kiev.

Three people have been killed in a Russian missile attack on the centre of the Ukrainian capital Kiev. President Zelensky said civilian structures, including a metro station, were damaged. Russia says it was targeting a missile factory in retaliation for Ukrainian attacks on its territory. Our Eastern Europe correspondent Sarah Rainsford is in Kiev.

Sarah Rainsford in Ukraine. A court in India has delivered a guilty verdict in the case of a man accused of the rape and murder of a female trainee doctor at a hospital in Kolkata. The victim's body was found inside the hospital last August. It triggered nationwide outrage and prolonged protests across the country.

Sarah Rainsford in Ukraine. A court in India has delivered a guilty verdict in the case of a man accused of the rape and murder of a female trainee doctor at a hospital in Kolkata. The victim's body was found inside the hospital last August. It triggered nationwide outrage and prolonged protests across the country.