The police are dealing with an incident between Stanford-le-Hope and Pitsea meaning the line is blocked.
Services running between Grays and Pitsea may be cancelled or delayed by up to 30 minutes.
This is expected until 17:15.
Check before you travel:
You can check your journey using the National Rail Enquiries real-time Journey Planner
Twitter:
If you would like to follow this incident on Twitter, please use #StanfordLeHope
Compensation:
You may be entitled to compensation if you experience a delay in completing your journey today. Please keep your train ticket and make a note of your journey, as both will be required to support any claim.