import React from 'react';

const Sinistr = React.createClass({
  render() {
    return (
      <div>
        Sinistre id
      </div>
    )
  }
});

export default Sinistr;

import React, { Component } from 'react';
import { Grid, Row, Col, PageHeader } from 'react-bootstrap';

export default class Sinistr extends Component {
  constructor (props){
    super(props);
  }
  render() {
    return (
      <div>
        Sinistre id
      </div>
    )
  }
}

migrate class to component