At least 37 people, including a dozen who were returning from a religious pilgrimage in Iraq, died Sunday in two unrelated bus crashes in Pakistan, officials said.

       Though the causes were under investigation, the accidents highlighted road safety in a country that experts say is known for poor road conditions, lax traffic enforcement and fatal crashes.

       “Poor enforcement, untrained traffic officers and unsafe vehicles make things worse,” said Syed Kaleem Imam, a former police inspector general.

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