Talks between lawmakers over border-security funding have broken down, an aide familiar with the negotiations said Sunday, increasing the likelihood of another government shutdown at week’s end.

Democrats and Republicans on the bipartisan negotiating committee are disagreeing over the number of detention beds at the border that would be set up under any agreement. Without an agreement on the number of beds, talks on funding levels and physical barriers have stalled, and it wasn’t clear when the discussions would resume, the aide said.

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