Analysis Summary:

The article's accuracy is mixed. The claim about a sixth round of negotiations scheduled for Sunday is partially supported by multiple sources indicating ongoing talks in April 2025, but the specific timing and Tehran's hesitation due to an Israeli attack are not consistently verified. There's a moderate bias due to the selective reporting of Iran's potential reluctance, possibly framing them negatively.

Detailed Analysis:

• Claim:** "The two sides were due to meet for a sixth round of negotiations on Sunday."
  • Verification Source #2, #3, #4, and #5 all confirm that US-Iran nuclear talks were ongoing in April 2025. However, none of them specifically mention a "sixth round" scheduled for a Sunday in June.
  • Verification Source #3 mentions talks in April 2025 and a potential meeting in Oman the following Saturday. This suggests a series of meetings, but not necessarily a "sixth round" on a specific Sunday in June.
• Status:* Partially verified, but the specific details are not confirmed.
• Claim:** "Tehran suggested that it had not yet decided whether to participate, given Israel’s attack on its nuclear infrastructure."
• None of the provided verification sources mention an Israeli attack on Iranian nuclear infrastructure or Tehran's hesitation to participate in talks due to such an attack.
• Verification Source #1 mentions Khamenei's doubts about the US nuclear talks leading to an agreement, which could be related, but doesn't directly support the claim about an Israeli attack.
• Status:* Unverified.

Supporting Evidence/Contradictions:

• Agreement:** Verification Source #2, #3, #4, and #5 all agree that the US and Iran were engaged in nuclear talks in April 2025.
• Disagreement/Lack of Coverage:** None of the provided sources mention a specific "sixth round" of talks scheduled for a Sunday in June, nor do they mention an Israeli attack on Iranian nuclear infrastructure as a reason for Tehran's potential hesitation.
• Supporting Evidence:** Verification Source #1 mentions Khamenei's doubts about the US nuclear talks leading to an agreement, which could be related to Tehran's potential reluctance.