1.   The pond water was strangled with poisonous weed.

2.   Investigators found that rice at the canteen contained datura, a poisonous weed.

3.   Researchers were checking to see if the animal was the victim of a lightning strike or ingested a toxin, including poisonous weeds.

4.   Researchers were checking to see if the animal was the victim of a lightening strike or ingested a toxin, including poisonous weeds.

5.   Attempts to resuscitate him at a medical centre failed and a post-mortem examination found his stomach swollen with the poisonous weed.